The World Gold Council is the market development organisation for the gold industry. Their 19 members are some of the world’s most forward-thinking gold mining companies, headquartered across the world and having mining operations in 47 countries.
The Silver Institute is a non-profit international association that serves as the silver industry’s voice in increasing public understanding of the many uses and value of silver.
The International Platinum Group Metals Association is a non-profit association that represents the worldwide leading mining, production and fabrication companies in the global platinum group metals (PGMs) industry, comprising platinum, palladium, iridium, rhodium, osmium and ruthenium. The major aim of the organization is to act as a platform for discussion and information exchange between its members and the outside world.
There are quite a few diamond trade and industry associations, but mainly with each having a different objective. The Diamonds A to Z site contains the kind of background information that explains the several facets of what diamonds are all about.