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This rock is composed of pararealgar (which is yellow to orange) which is an arsenic sulfide and carbonate (which is gray)
Size: 5 x 8mm
Gemological information about iolite:
Different countries where black tourmaline may be mined: Brazil
Solar quartz cabochon
Améthyste chevrons 68 Méditation This rock is composed ofChevron amethyst cabochon. Color: Purple streaked with white Shape: Drop Size: 40. 58 x 23. 68mm Weight in grams: 10. 65g Carat weight: 53. 30 carat Country of origin: Brazil Gemological information about amethyst: Possible color: Blue mauve, purple, dark magenta, purple magenta Density: 2. 65 Hardness: 7 Crystal system: Trigonal Fracture: Conchoidal Cleavage: None Polariscope: Anisotropic (restores all 90, except in the optical axis) Refractive
