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
The Essence of Black Purity The Essence of Black Purity The Essence of Black Purity is the third release by the black metal band Watain. It was released in 1999 on EP format on Grim Rune Records and was limited to 300 copies. Grim Rune website mentions that the EP "got a generally good response in the underground circuits." Similarly, Eduardo Rivadavia of "Allmusic" wrote that Watain "quickly gain[ed] underground credibility" with this "uncompromising 7" release". When asked his opinion about Watain's older albums, vocalist Erik Danielsson said: "I appreciate them for what they are, monuments of what we were before, pieces of evolution. The