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 S7 was launched in 2018 slightly altering the front grilles and bumper and changing the tail lamps to red. Refine S7 The Refine S7 is a mid-size CUV that was produced by JAC Motors under the Refine sub-brand and positioned above the compact Refine S5. A 1.5L turbo putting out 174hp and 251nm of torque and a 2.0L turbo producing 190hp and 280nm of torque is available, both available with a six-speed manual transmission or a six-speed DCT. The engine lineup of the Refine S7 is exactly the same as the Refine A60 sedan. The Refine S7 is available in both