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MTL - I Have a Store In the World of American Comics - v2 Chapter 71 the door of reappearance
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v2 Chapter 70 Optical perception
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v2 Chapter 72 2nd formula
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... ular aggregates.
When pure, it is colorless and transparent. When it contains impurities, it is dyed into various colors, with white streaks, vitreous luster, and transparent to translucent.
Three groups of cleavage are complete, and the included angle is equal to or close to 90°. Mohs hardness is 3-3.5, specific gravity is 4.0-4.6. Identification features: plate-like crystal, small hardness, complete cleavage at near right angles, high density, no foaming in the presence of hydroc ...
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