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    hardness of diamond contributes to its suitability as a gemstone. Because it can only be scratched by other diamonds, it maintains its polish extremely well. It is chemically resistant and is the only gem composed of a single chemical element i. e. carbon. Only two impurities such as boron and nitrogen are reported to be found in diamond.

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    Which aggregate's crystals are visible only with magnification greater than a standard gemological microscope's. process that involves heating finely ground powder, sometimes under pressure, to produce a fine-grained solid material. what color is top-quality alexandrite in daylight? bluish green.

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    Metal Powder and Process United Kingdom Private Metal Powder & Process (MPP) was established to produce high quality metal powders by gas atomisation for the aerospace, medical, and other industries. Metal is melted at the top of the atomiser, a machine the size of a small house, poured through a nozzle and blasted by jets of supersonic argon gas, and so turned into dust.

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    A Novel Method to Make Boron-Doped Microcrystalline Silicon Thin Films with Optimal Crystalline Volume Fraction Effect of Grain Boundary on the Field-Effect Mobility of Microrod Single Crystal Organic Transistors Jaekyun Kim, Jingu Kang, Sangho Cho, Byungwook Yoo, Yong-Hoon Kim, and Sung Kyu Park Performance Improvement of Green

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    May 22, 2016· In addition to the previously documented near- colorless and brown CVD material, Martineau et al. (2004) reported on high-quality single-crystal CVD synthetic diamond with blue color produced by boron doping during crystal growth and on a 0.85 ct round-cut as-grown fancy brownish pink CVD syn- thetic diamond (see sample N8 in table 3 of that

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    YAG boule top. YAG stands for yttrium-aluminum-garnet: It's used to make lasers and can be doped with various elements to create different colors. This green one, for example, is doped with chromium. The conical shape is similar to that of my silicon boule top, presumably because they are made by similar crystal-growing procedures. A crystal

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