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
Refine M5 it between the Refine M4 and Refine M6 MPVs within a long line of products. The second generation Refine M5 MPV was priced from 139,500 to 166,500 yuan. Refine M5 The Refine M5 (瑞風, Ruifeng M5) is a light commercial, 4-door van built by the JAC Motors (Jianghuai Auto Corporation) in China since 2002. The first generation Refine M5 MPV started out as a rebadged first generation Hyundai Starex due to the joint venture between Hyundai and JAC Motors with JAC building rebadged Hyundai Starexs under license in March 2002. The original name at launch was simply JAC Refine, later,