Auteursarchief: ReneKervezee


Over ReneKervezee

Ik ben penningmeester van het gemmologisch gilde. In 2007 ben ik getrouwd met Anne Ruijgrok, onze dochters heten Daphne en Evelien. Mijn vader en ik zijn eigenaar van een juwelierszaak. Vroeger stond ik in de box voor de kluis nu ben ik goudsmid & juwelier.

CIBJO President to present new Responsible Sourcing Blue Book at OECD’s Responsible Minerals Supply Chain Forum in Paris

ABOVE: OECD headquarters in Paris, the venue for next week’s 13th Forum on Responsible Mineral Supply Chains.



APRIL 17, 2019

CIBJO President Gaetano Cavalieri will present the World Jewellery Confederations’ recently approved Responsible Sourcing Blue Book next Tuesday, April 23, 2019, to the full plenary of the 2019 Forum on Responsible Mineral Supply Chains, organised by the Organisation for Economic Cooperation and Development (OECD) at its headquarters in Paris.

The OECD forum, which this year will welcome about 1,200 delegates, will feature sessions on measuring impact and driving change, opportunities and challenges related to specific minerals such as diamonds, base metals, cobalt, the 3Ts and gold, and regulatory and policy updates related to responsible sourcing. In particular, the forum will focus on the OECD’s highly-regarded Due Diligence Guidance framework for minerals from high-risk areas.

The CIBJO president will be speaking during a late afternoon session on the first day of the forum, at which selected OECD stakeholders  will provide overviews of current and upcoming projects, with a focus on toolkits and data sources meant to facilitate the OECD Due Diligence Guidance for Responsible Mineral Supply Chains.

The first edition of the Responsible Sourcing Book was approved by the CIBJO Board of Directors in January of this year. While not a definitive code of practice, it recommends guidelines and procedures by which all participants in the jewellery supply chain may undertake supply-chain due diligence to support  responsible sourcing, irrespective of their size or financial capacity, to identify, assess and mitigate any identifiable risks related to  human rights, labour practices, money laundering,  financing of confict and corruption.

It becomes the latest in CIBJO’s Blue Book series of industry guides for standards and nomenclature. It specifically references the the OECD’s five-step Due Diligence Guidance for Responsible Mineral Supply Chains, and supports the United Nations Guiding Principles on Business and Human Rights.

During his presentation, Dr. Cavalieri will also outline a complementary programme, currently being created to support members of the jewelry industry implement the recommended due diligence measures in their own businesses.


CIBJO release 17-04-2019


CIBJO President to present new Responsible Sourcing Blue Book at OECD’s Responsible Minerals Supply Chain Forum in Paris

Click PDF icon on left to download document


Mondstein aus dem Zillertal

Die alpinen Klüfte sind berühmt für ihren Mineralreichtum, darunter auch eine ganze Reihe von Kristallarten, die als Edelsteine Verwendung finden können. Ein bekanntes Beispiel sind alpine Kalifeldspäte, die als Adular bezeichnet werden. Es handelt sich hierbei um farblos-weißlichen Kalifeldspat, der in alpinen Klüften hydrothermal entstanden ist.
Ein bekanntes Vorkommen schöner und gut ausgebildeter Adularkristalle ist das Mörchnerkar im Zemmgrund der Zillertaler Alpen, Österreich. Klare Exemplare zeigen oft einen attraktiven Mondsteineffekt (Adularisieren).



TS Mondstein Mörchnerkar Zillertal M. Wild Fac. 356 121 ct

Mondsteine vom Mörchnerkar im Zillertal (Österreich).

(Sammlung Firma Werner Wild e.K., Idar-Oberstein. Foto: T. Stephan, DGemG)



Den vollständigen Artikel im PDF-Format finden Sie hier: Mondstein_aus_dem_Zillertal.pdf

Bron: Deutsche Gemmologische Gesellschaft e.V.

DGemG-Information: Flussmittelsynthesen bei Korund

Eines der heute wichtigsten Verfahren zur Herstellung synthetischer Korunde ist das Flussmittelverfahren. Mit kommerzieller Bedeutung werden in diesem Verfahren seit 1958 synthetische Rubine in diesem Verfahren hergestellt. In der vorliegenden DGemG-Informationen soll das Herstellungsverfahren besprochen, sowie die Erkennungsmerkmale vorgestellt werden.



BH Korund Flux Chatham 2x rot Sammlung links094ct rechts095ct

Synthetische Rubine, hergestellt im Flussmittelverfahren.



Den vollständigen Artikel im PDF-Format finden Sie hier: Flussmittelsynthesen bei Korund

Bron: Deutsche Gemmologische Gesellschaft e.V.

Speaking to audience of Italian business leaders, CIBJO President outlines sustainability strategy for jewellery industry

ABOVE: CIBJO President Gaetano Cavalieri (second from left), at the podium during the Conova Club meeting on sustainability in Milan on April 10, 2019. He is joined on the podium by (from left) Professor Enrico Giovannini; moderator Laura La Posta, Editor in Chief of Il Sole 24 Ore; 2001 Nobel Prize Laureate Professor Andrew Michael Spence; and Alexia Giugni, Managing Director of the DWS Group.


APRIL 10, 2019

Speaking yesterday to members of the Canova Club, an exclusive Italian association of opinion leaders and decision makers from the country’s economic, finance and business communities, CIBJO President Gaetano Cavalieri has described what he termed as an essential shift in thinking in the jewellery industry, where the attitude towards artisanal and small-scale mining is changing from it being considered a challenge, to being more of an opportunity.

“Defensive measures in which the industry has played a key role, like the Kimberley Process, have helped reduce the level of violence in regions where artisanal mining is taking place, although there is good deal that still needs to be done, particularly in terms of systemic violence,” he said. “But in addition to that, the industry is getting involved at the grass-roots level to help equip and educate the artisanal mining communities, providing them legal access for their merchandise into the marketplace, and supplying them with knowledge to ensure that they are being paid fairly for what they produce.”

CIBJO President Gaetano Cavalieri during the Conova Club meeting on sustainability in Milan.

Founded in Rome in 1978, the Canova Club gathers together a virtual who’s who  of the Italian business world, conducting conclaves at which issues of common interest are discussed. The most recent gathering focused on the theme of “Sustainability: A Megatrend or Utopia?”

It featured a panel that included Dr. Cavalieri; Enrico Giovannini, a professor of economic statistics at the University of Rome Tor Vergata, who in 2013 and 2014 served as Italy’s Minister of Labour and Social Policy, and between 2001 and 2009 was Director of Statistics and Chief Statistician of the Organisation for Economic Co-operation and Development (OECD); and Andrew Michael Spence, a Canadian-American economist and labour specialist at New York University, Stanford University and the SDA Bocconi School of Management in Milan, who in 2001 was the recipient of the Nobel Memorial Prize in Economic Sciences. The moderator of the event was Laura La Posta, Editor in Chief at Il Sole 24 Ore, a leading business daily in Milan.

In his wide raging overview of the economic and social role of the jewellery sector in developing countries, Dr. Cavalieri said that some of the traditional definitions of sustainability needed to be adjusted for an industry where many of its raw components are mined.

“For minerals, we have defined sustainability as their potential to generate sustainable grass-roots economic and social opportunities in the countries and regions in which they are located,” Dr. Cavalieri said. “And here we refer to opportunities both in the mineral extraction and the jewellery industries, and also in other economic sectors, which are secondary beneficiaries of the investments made in and revenues generated by precious gems and minerals.”

“But we do need to draw a distinction between industrialised mining operations and small-scale and artisanal mining,” he continued. “Larger mining companies typically have massive social development programmes, and are subject to stringent environmental regulations, which are part and parcel of their modus operandi. The same is not true of artisanal mining, which often is carried out by individuals or two or three-person operations, using the most basic equipment, with health and safety not primary concerns. These are the miners whose security is most likely to be threatened, and who often do not not properly understand the value of what they have extracted, meaning that they are frequently exploited by the traders who buy their goods.”

However, noted the CIBJO President, There also parts of the jewellery business, where not only economic activity is sustainable, but so is the product – environmentally as well as socially and economically. “These most often these involve biogenic materials in a marine environment, where sustainability is made possible through aquafarming, such as with cultured pearls, or controlled harvesting, as with precious coral,” he stated.

Over the past several years there has been been a strong move towards the adoption of uniform standards of practice, so as to optimise conditions in which sustainable activities can take place, Dr. Cavalieri said. These include the creation of strict codes, against which companies can be audited and certified.

“In principle these are positive developments, but they have raised some very difficult challenges for an industry that is made up predominantly by SMEs. Small companies, with limited human and financial resources, often struggle to meet the demands of compliance organisations, and many family-owned firms, which are ethical and often have been in the business for generations, find themselves being pushed aside by clients, simply because they are not certified as compliant,” Dr. Cavalieri continued.

CIBJO, he said, has been working hard to provide solutions, and particular in the more fragile sectors of the jewellery business, like coloured gemstones, where almost all firms qualify as SMEs, even the mining companies. Its new Responsible Sourcing Blue Book provides a framework and guidance for ethically sourcing gems and precious metals responsibly in the jewellery sector, referencing  the OECD’s Due Diligence Guidance for minerals from high-risk areas.

“The philosophy that guided us in the creation of the Responsible Sourcing Book is that all participants in the jewellery business have a duty of care, and thus should conduct supply-chain due diligence to the best of their ability,” the CIBJO President said.

“I strongly believe that, by committing to sustainability, our industry is able redefine the value proposition of our products in the public consciousness. Not only are they objets d’art and symbols of love and devotion, but they also are instruments that actively serve to create better and more sustainable societies” Dr. Cavalieri stated.

“When consumers buy jewellery, they should feel that they are not only doing something for themselves and their loved ones, but for the world and society as well,” he said.

A view from the audience during the Conova Club meeting on sustainability in Milan on April 9, 2019.


CIBJO release 10-04-2019


Speaking to audience of Italian business leaders, CIBJO President outlines sustainability strategy for jewellery industry

Click PDF icon on left to download document