Posts tagged sustainable
Blog 13: Environmental Sustainability in the precious metal sector, Round-table discussion

I was invited by the Crafts Council to take part in a round-table discussion on the subject of environmental sustainability in the precious metal sector. I was very excited to have been invited and the meeting took place last week, 25th January 2023 in Birmingham at the STEAMhouse.

Image Credit: Jade Mellor

Participants:

The meeting had been organised as a direct result of the annual Crafts Council Maker Needs Survey (2021), in which 85% of makers expressed the wish for further guidance on being more environmentally sustainable in their business, with “a majority of respondents indicating environmental considerations are important to them.”

As such, various round table discussions were organised, each centring on a different discipline and these were to be held in 2022/23 with the results to be published in the spring of 2023.

For our meeting, Caroline had invited professionals with diverse areas of expertise in the precious metal industry to ensure a rich discussion and outcome. She had also circulated a number of questions to be discussed prior to the meeting.

These covered: our understanding of being ethical; what we were already doing in our business; the barriers in our way as well as our motivations for adopting an ethical stance in our work; how much we are influenced in our ethical approach by our customers; our vision for a more ethical future in our work as well as our needs to achieve said vision.

With some participants more knowledgeable in the field of sustainable and ethical practice than others, the round nevertheless provided a positive atmosphere of equality that allowed for the frank exchange of views and thoughts.

Whilst many issues were discussed, my personal favourite comments were:

  • Making the precious metal industries sustainable and ethical requires leadership.

  • This leadership should ideally come from industry and established institutions but in their absence, it is down to everyone to make a difference.

  • For this we need a clear set of values, encompassing, for example, equality, justice and a priority of the poor and environment over resources.

  • We not only need leadership, but also funding to enable change to take place; for research to be undertaken, these kind of talks to take place, etc.

  • We need existing organisations, institutions and individuals, who have already done pioneering work in this field, to cooperate, to share their findings and make them easily accessible to all in the field.

  • The biggest players in the industry, such as the Goldsmiths’ Company, need to become leaders in the field of ethical jewellery, but for that to happen it needs to become more open to change and to an increased inclusion of women.

I look forward to reading the summaries and findings of these discussions and am excited about what changes it may lead to in the future.

Hendrike













Blog 11: Tarnish Removal (Part 2)

This is the second part of my Blog on the removal of tarnish from silver jewellery. Please click here to read the first part (Number 10)

In the previous part (1) I gave a brief overview of the element silver, what tarnish is and how it occurs and I looked at two methods of removing tarnish: by using an impregnated polishing cloth and by using a chemical solution, or silver dip.

In this second part I will be looking at two further methods. The first one is an interesting process that can be done easily at home with baking soda/washing soda, hot water and aluminium foil and various recipes can be found online.

Electrochemical process (Sodium Bi/Carbonate and Aluminium Foil)

In this process, a ceramic bowl is lined with aluminium foil and a solution of baking soda (sodium bicarbonate) or washing soda (sodium carbonate) and hot water, into which the tarnished piece is submerged. I did experiments with both sodium bicarbonate and sodium carbonate and did experiments to find out for well both works.

The process is electrochemical, with the carbonate solution acting as the electrolyte. As long as contact is maintained between the two metals, the aluminium corrodes and hydrogen gas is produced. This gas then reacts with the tarnish, reducing it back to the silver metal.”[1]

The object of my experiments was to find how I could remove tarnish from textured surfaces, pieces with a satin finish and those with Keum-Boo patterns.

I tarnished a few silver test pieces with the boiled egg method[2]. All silver pieces had a deep, dark-brown tarnished surface. These pieces were also textured, some lightly, some more heavily and some also had 24ct gold Keum-Boo gold patterns.

I lined a ceramic bowl with aluminium foil, added circa 300ml hot water and then a table spoon of sodium bicarbonate / sodium carbonate. I placed the tarnished pieces into the solution and left it for 10 minutes. After this period I lifted the piece out and rinsed it with ionised water.

One can see a brownish rim on the aluminium foil in the bowl which is the removed tarnish.

Baking Soda (Sodium Bicarbonate)

This solution worked well for lightly tarnished surfaces, but it struggled with tarnished pieces that had a deeper brown colour. Even after repeating the process with fresh solution was the tarnish not completely removed.

 

Washing Soda (Sodium Carbonate)

In the experiment using sodium carbonate I used three pieces I had used in previous tarnish removal experiments as well as one ‘new’ one. All pieces were tarnished with the boiled egg method (see footnote 2) and had a deep brownish-black colour. They were left in the sodium carbonate solution for 10 minutes. After this period most of the tarnish was removed from the ‘new’ piece, whilst the other three still showed quite a bit tarnish.

In summary, this process works well for lightly tarnished pieces, or as a first step of removing some tarnish, to then be followed up by a second method.

Washing soda (sodium carbonate) is a substance that occurs naturally and its safety data sheet classes it as not dangerous for the environment, indeed it is often used as an eco-friendly cleaning agent in the home. Despite this, care must be taken when using it as it can be an irritant for hands and eyes.

Baking soda (sodium bicarbonate) works similarly to washing soda and it is also considered a very safe, biodegradable and eco-friendly cleaning agent.

Other Methods: Precipitated Calcium Carbonate

When researching this subject I came across various documents online published by the Canadian Conservation Institute (CCI). These dealt with different processes of removing tarnish from museum objects and were very thoroughly researched papers and very valuable for this blog.

These papers explained in detail the various aspect on how tarnish occurs, how it can be prevented and how it can be removed.[3]

In relation to removing tarnish it also mentioned another method which falls into the first category of using mechanical action. The substance used here is precipitated calcium carbonate – super-fine chalk (CaCO3).

The article explained, amongst other things, that silver sulphide (tarnish) is a somewhat softer than the actual silver and that calcium carbonate is slightly harder than silver. This make it an ideal and still very gently abrasive to use to remove tarnish.

What is Precipitated Calcium Carbonate (PCC)?

Calcium carbonate (chalk) is a naturally occurring substance. “It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor.”[4]

Precipitated calcium carbonate (PCC) is an innovative product derived from lime, which has many industrial applications.  PCC is made by hydrating high-calcium quicklime and then reacting the resulting slurry, or ‘milk-of-lime’, with carbon dioxide.  The resulting product is extremely white and typically has a uniform narrow particle size distribution.  PCC is available in numerous crystal morphologies and sizes, which can be tailored to optimize performance in a specific application.”[5]

Is PCC eco-friendly?

The Safety Data Sheet by Thermo Fisher Scientific, one of the companies selling this product, states that PCC does not pose any health or environmental hazards.

As the chalk is a very fine powder care should be taken not to inhale the dust, but as it is mixed with water this risk is somewhat reduced. Rubber gloves should be worn when using it as the powder is abrasive on the skin.

How is it used?

PCC is mixed with tap water to make a paste and is then rubbed over the tarnished surface with a soft cloth.

The substance will turn greyish and it should then be rinsed off with clean tap water. Afterwards the piece should be thoroughly dried.

Results:

I made a paste as described above and used it on some of the above-mentioned tarnished pieces on which the sodium bicarbonate/carbonate and aluminium solution did not fully remove the tarnish.

The calcium carbonate worked very well on all the test pieces. It removed the tarnish completely. The pieces became slightly shinier after the treatment but the surface felt whiter - in comparison to using a polishing cloth.

None of the methods used above were able to retain a previous matte surface finish on the piece.

I contacted the CCI to find out about any specific methods of removing tarnish from matte surfaces. They replied saying that they had no methods of removing tarnish and preserving the matte original surface finish of a piece.

Conclusion:

Removing tarnish from silver can be done in various ways. In terms of their environmental impact or hazardous nature, the most hazardous is the silver dip.

Using a polishing cloth, sodium bi/carbonate and calcium carbonate are low impact methods of removing tarnish, however they may differ in their effectiveness.

Lightly tarnished objects can be cleaned by using polishing cloths or the sodium bi/carbonate, aluminium foil method. For more stubborn tarnish precipitated chalk is a good way of removing tarnish.

I have not found a method of removing tarnish from matte surfaces whilst preserving the matte finish. The matte surface finish would have to be re-applied after tarnish removal. For the customer, those pieces of jewellery should best be given to a jeweller who can restore the previously matte surface finish.

I hope you have found these two blogs interesting. Do let me know if you have any comments.





[1] (Silver – Care and Tarnish Removal – Canadian Conservation Institute (CCI), Notes 9/7, (2019) https://www.canada.ca/en/conservation-institute/services/conservation-preservation-publications/canadian-conservation-institute-notes.html )

[2] As hard-boiled eggs contain and release hydrogen sulphide, they can be used to tarnish objects quickly. Though it is less predictable, it is an eco-friendly way to darken pieces of jewellery. All pieces developed a speckled brown hue which may have been due to the condensation of water inside the closed box.

[3] See footnote 1 above.

[4] Wikipedia: https://en.wikipedia.org/wiki/Chalk

[5] https://www.lime.org/lime-basics/uses-of-lime/other-uses-of-lime/precipitated-calcium-carbonate/

Blog 3: Understanding What Makes Jewellery Ethical

Last week I took part in the Fair Luxury Open House Zoom session on Provenance Power: The Positive Impact of Traceable Gold. It promised to be interesting, given the current background of war between Russia and Ukraine and the relevant question whether Russia may use its gold reserves and gemstones to finance its war.[1]

These Open Houses have been a great source for understanding what makes jewellery ethical. I will use this third blog to clarify my thinking on some aspects. There are many people more expert in this field and the article below is just a starting point for me to grasp the different concepts.

 ***

To make jewellery ethical is a complex task and requires knowledge in diverse and multifaceted areas. Thus far my efforts have concentrated on the small-scale, manageable aspects of my business, such as studio practices and the sourcing of some materials. As I mainly use silver, little gold and no gemstones, my knowledge of the various ethical standards and initiatives was limited.

Fairtrade / Fairmined

Last year I investigated the conditions for signing up to using Fairmined gold/silver as I was hoping to include more gold in my work. After careful consideration I concluded then that it would have to remain a future aim until I could be sure to financially warrant the cost of using this scheme. I turned instead to the newly-established Single Mine Origin (SMO) gold, offered by Betts Metals.

I remained interested to see what the community of ethical jewellers thought about SMO gold and was keen to hear the discussion at the up-coming Fair Luxury Open House, which was to include a speaker from Betts talking about SMO gold. The other speakers were Rachel Brass from Levin Sources, and Greg Valerio. Rachel Brass is the Project Director for USAID's Zahabu Safi (Clean Gold) Project. This project “aims to develop and deliver activities to establish a commercially-viable, responsible and conflict-free supply chain for artisanal and small scale (ASM) gold from eastern DRC.”[2]

Greg Valerio, a veteran in the ethical jewellery movement, spoke about his involvement in the PeaceGold© initiative, also in eastern DRC, that aims to establish local gold mining cooperatives that benefit the community and which employ decommissioned militia men, thus also acting as a peacebuilding project.

It was interesting to note that these speakers all had personal involvement in the Fairtrade/Fairmined (FT/FM) programs that have now existed for 15 years. However, they all seemed to imply that although the FT/FM standards presented a perfect model in terms of standards for small-scale and artisanal mining it was sometimes difficult to apply this ‘all-or-nothing’ approach in other settings.

Kyle Abram recently wrote an interesting article entitled ‘Are Fairmined and Fairtrade Gold Elitist?’[3] Although he concluded in the end that they are not, he made various thought-provoking points and seemed to support the above idea that the FT/FM standards are perhaps too rigid and need re-adjusting. He cited statistics to support his thinking which I briefly elaborate on below.

According to the report 2020 State of the Artisanal and Small-Scale Mining Sector,[4] there are currently 44.75 million people in 80 countries who rely on Artisanal and Small Scale Mining (ASM) as their main source of income. Taken together with all those who work in related industries, there are 134 million people whose livelihoods depend on ASM.

Whilst it is difficult to get exact numbers, at least 30 % of these people are women. To quote the World Bank 2020 report cited above, “Quite simply, women are not being counted.”[5] Although women make up an essential part of the workforce – often working in the processing of the minerals – there are disagreements on definitions of what constitutes a ‘miner’ and as a consequence women may just not be included in the count. Women of course also suffer “Adverse side effects of mercury use, unequal pay for similar work, sexual harassment, and inability to own land or mining titles without permissions […].”[6]

Abrahm notes further that of all small scale miners “100% are Black, Indigenous, and People of Color (BIPOC)”[7] – an important point if we consider the issue of racism within the industry.

In terms of output it is worth noting that ASM produces 25% of all globally mined diamonds, 20% of all gold and 80% of all sapphires.

These figures become even more interesting when contrasted with data of large-scale industrial mining operations, which supply the majority of these minerals. Compared to the number of people working in ASM, there are only 7 million people who are employed in industrial mining (please note that this data is from 2013).[8] 

With respect to the Fairtrade/Fairmined programs Abram makes the further point that these operate in 15 mines in Peru and Columbia and support overall 1,800 miners. He questions the success of these programs when contrasted against the number of 44.74 million people working in ASM globally.

Looking at these statistics in context highlights the need that the minerals we use as jewellers should ultimately benefit those who mine them, in other words those circa 45 million artisanal and small scale miners and their communities worldwide.

Another point worth making in reference to the locations in which FT/FM operate (Peru and Columbia) is by looking at a map that shows the locations by density of ASM operations.[9] What stands out are the countries in dark pink with more than 1.5 million people working in ASM.[10] These countries are DRC in Africa and China, India and Indonesia in Asia. This explains possibly the focus of the above three speakers on Africa and the need to establish structures there that support ASM communities.

SMO Gold

Back at the Open House, Duncan Marshall of Betts Metals was a representative of corporate mining and spoke about Single Mine Origin (SMO) gold – their new project. The gold is mainly sourced from their Yanfolila Gold Mine in Mali and the company promises “socially and environmentally responsible gold mines and ensuring such projects are beneficial to their host communities.”[11] The idea of SMO gold is to provide full traceability of the gold, from mine to finished product. So, when purchasing gold I am given a QR code which traces this gold batch to the mine it was produced from.

The big difference between SMO gold and Fairtrade/Fairmined gold is the size of the mines and who operates and benefits from them. Whilst FT/FM miners are local individuals working with little and low-tech resources in rivers and pits to find gold, SMO gold is mined by a large corporation with great financial backing.[12]

Bearing in mind that Betts Metals also offer FT/FM gold, a member of the audience at the Open House questioned Marshall about SMO’s position vis-à-vis FT/FM gold. Marshall defended his company’s efforts by stating that corporate gold mining was a fact (given the quantities mined) and whilst it would continue to exist, SMO gold was an ethical alternative to other corporate mines. He acknowledged the continued value, aims and achievements of the FT/FM programs but explained that SMO was trying to fill a gap in terms of ease of access and affordability to jewellers who would like to use ethical materials but could not quite afford to sign up to becoming a licenced FT/FM jewellers.

Another criticism of SMO gold comes from Edward Fleming of the Ethical Jewellery blog. In an article[13] he elucidates one of the principles of FT/FM gold – the requirement of external independent audits of the mining operation. These ensure that the FT/FM standards are upheld and provide assurance to the buyer of the gold.

The SMO and Hummingbird Resources[14] website have perhaps not been updated but they differ in the information they offer. Between the times of publication of Fleming’s article in October 2021, and now the wording on the SMO website seems to have changed. It now states:

“Rather than creating a brand-new standard, SMO uses existing major assurance standards to define a responsible source. The standard used for the current SMO mines is the World Gold Council’s Responsible Gold Mining Principles (RGMPs). The International Council on Mining and Metals Mining Principles (ICMM) has equivalency with the RGMPs and would also be deemed as a suitable responsibility standard by SMO. The Mines signed up to these assurance standards undergo independent auditing to ensure they employ international best practice across all areas of their operation.” [15]

Hummingbird Resources does not appear on the ICMM website as a member and it is therefore difficult to establish the meaning behind ‘signed up to these standards’. As Fleming also points out, the World Gold Council is a marketing organisation for the gold industry and therefore hardly an independent organisation. SMO needs to be clearer about who the independent auditors are and their auditing process to ensure consumer confidence in its product.

African Initiatives

Going back to the other current initiatives taking place in Africa, Kyle Abrams in his article and Greg Valerio in his Open House presentation both illustrated the human perspective of ASM in the Democratic Republic of Congo (DRC). Valerio talked about the desires of ex-militia men to decommission their weapons and withdraw from conflict to build sustainable futures for themselves by building structures to enable them to make a living through gold mining. The peacebuilding effects these projects could have and consequent wider impact on local communities are immense.

In his article Abrams (commenting on a visit to the DRC project Zahabu Safi) also provided examples of the complex situations on the ground that do not easily fit the ‘gold’ standards of FT/FM. Whilst child labour should be condemned for example, he quotes a local landowner, who cautions:

“You have to understand the situation on the ground. Here, you'll meet a 15 year-old boy who has two wives. Or a 15 year-old girl who has two children of her own. So, for the purposes of child labor, do we consider them children or adults? They have families to provide for, and if their income is taken away, they will rebel.”[16] Likewise, Abram comments that he would prefer a seven year old child to attend school rather than working as a miner, but asks “[…] what if there’s no school within 100 kilometers?”[17]

Human stories such as the above do much to illuminate what lies behind the often difficult to grasp and abstract concepts of sustainability and ethics. Whilst there is a lot of jargon in the industry, it is important to bear in mind that behind all the policies, the standards, the definitions are people who live and work in often harsh and dangerous conditions, who want to earn a living for themselves and their families and that the circumstances in which they work and the fruit of their labour has a direct connection to my work as a jeweller here in the UK.

So, how does all the above fit into my thinking and current work? Listening to the Open House presentations (and discussions afterwards), reading various articles and distilling it by writing this blog helped to clarify my thoughts. Whilst it remains a vast field, I have started to understand the complexity of the interconnected issues that are at stake. As so often, simple solutions for complex problems do not exist and even tried and tested methods may need adjusting to fit new situations.

To sum up what makes jewellery ethical, Marc Choyt provides a good explanation:

 “[…] chain of custody, traceability, and transparency are all foundational to ethical practices but true ethical jewellery must have one other main feature—a focus on small-scale mining communities. […] For jewellery to be truly ethical, a jeweller should be able to confirm his or her purchase from these miners is actually maximizing benefit to their local economy.”[18]

Edward Fleming provides an even shorter, more succinct definition: “Ethical jewellery is jewellery that has been made with materials and using manufacturing processes that cause minimal harm to the environment and that benefit the communities involved.”[19]

As an independent jeweller and small business I have the power to make certain choices and whilst financial considerations play a significant part, I must weigh them against what is right. These choices do not just include the sourcing of precious metals and gemstones, but encompasses also studio practices and other activities that would contribute to making my work ethical. It remains an on-going process.

 


[1] See also today’s (31/3/3022) article in The Guardian (UK), Major jewellers to cease buying Russian-origin diamonds after increased scrutiny, Tess McClure  https://www.theguardian.com/world/2022/mar/31/major-jewellers-to-cease-buying-russian-origin-diamonds-after-increased-scrutiny as well as Guardian article Jewellery industry accused of silence over Russian diamonds, by Tess McClure, 29/3/2022 https://www.theguardian.com/world/2022/mar/19/jewellery-industry-accused-of-silence-over-russian-diamonds

[2] https://www.levinsources.com/who-we-are/team/rachel-brass-cvcfg

[3] Are Fairmined and Fairtraide Elitist? Kyle Abram, 23 February 2022, https://ethicalmetalsmiths.org/blog/are-fairmined-and-fairtrade-gold-elitist

[4] World Bank. 2020. 2020 State of the Artisanal and Small Scale Mining Sector. Washington, D.C.: World Bank. The 2020 State of the Artisanal and Small-Scale Mining Sector is a collaboration between the World Bank’s Extractives Global Programmatic Support Multi-Donor Trust Fund and Pact. https://stateofthesector.delvedatabase.org/#KeyFindings

[5] World Bank. 2020; p90

[6] World Bank. 2020; p5

[7] Kyle Abram, 23 February 2022

[8] Intergovernmental Forum on Mining, Minerals, Metals and Sustainable Development (IGF). (2017). Global Trends in Artisanal and Small-Scale Mining (ASM): A review of key numbers and issues. Winnipeg: IISD. https://www.iisd.org/system/files/publications/igf-asm-global-trends.pdf

[9] See the map https://delvedatabase.org/data

[10] It is worth noting here too that the data sources for some countries seem quite old and one could assume that the current number is much higher.

[11]See SMO website: https://singlemineorigin.com/what-is-smo-gold/origins-of-smo/

[12] See here also Pioneers in Jewellery, Edward Fleming, 28 October 2021 https://www.ethicaljewelleryblog.com/home/pioneers-in-jewellery

[13]Pioneers in Jewellery, Edward Fleming, 28 October 2021 https://www.ethicaljewelleryblog.com/home/pioneers-in-jewellery

[14] The British company owning the gold mines. See https://www.hummingbirdresources.co.uk/

[15] https://singlemineorigin.com/what-is-smo-gold/smo-responsibility/

[16] Kyle Abram, 23 February 2022

[17] Kyle Abram, 23 February 2022

[18] What Makes Ethical Jewelry Ethical?, Marc Choyt, https://ethicalmetalsmiths.org/blog/what-makes-ethical-jewelry

[19] What is ethical jewellery?, Edward Fleming, 10 July 2021,  https://www.ethicaljewelleryblog.com/home/what-is-ethical-jewellery