Carbon trade in both types of diamonds exists, the two markets act in dramatically different ways. Unlike precious metals such as gold or platinum, gem diamonds do not trade as a commodity: there is a substantial mark-up in the sale of diamonds, and there is not a very active market for resale of diamonds. Industrial diamonds are valued mostly for their hardness and heat conductivity, with the gemological qualities of clarity and color being mostly irrelevant. About 80% of mined diamonds (equal to about 100 million carats or 20 tonnes annually) are unsuitable for use as gemstones are relegated for industrial
Commodity pool to the Securities and Exchange Commission, regulate commodity pools. Many hedge funds are commodity pools. Funds that trade in commodities, which include many of the largest funds engaged in macro-strategies, are registered with the Commodity Futures Trading Commission as commodity pools and as commodity trading advisors (CTAs). In an address to the Securities Industry Association in 2004, Sharon Brown-Hruska, acting director of the CFTC, said that 65 of the top 100 funds in 2003 were commodity pools, and 50 out of the 100 largest hedge funds were CTAs in addition to being commodity pools. Commodity pool A commodity pool is