PRODUCT INFORMATION Product Name: Onyx Sediment Stone. Weight: irregular size of 15 to 30 gram Color: White Cuts: Rough Cuts Shape: Irregular rectangular Shape ( Can come in any shape) Gem Family/ grouping: Chalcedony General Quartz Group Description: crispy whitish in color, Smooth Waxy Luster, with irregular cut shape and size, weighs between 15 gram to 30 gram. Gravity : 2.58 - 2.64 Refractive Index : 1.55 - 1.54 Hardness : 6.5 - 7.0 on Moh's scale Chemical Properties of Onyx Formula : SiO2 *45O2 Elements : Si and O Uses: For Synthetic Diamond and Gem productions Origin: South East Asia and Asia Pacific. 到底是什么东西啊？有做的朋友相互交流下。
