Gloss: Color: white, shiny glass, with a little gray, yellow to orange, purple, purple, pink, gray and brown, brown, black and white streak: proportion: 2.65 ~ 2.66 categories: metamorphic rocks, metamorphic sandstone. (1) brittle (2) with thermoelectric (3) refractive index 1.533 ~ 1.541, double refractive index difference of 0.009, 0.013 (4) with dispersive quartz piezoelectric property (piezoelectric property), which is hard hit when friction sparks, this method is flint stone. (5) in common with quartz inclusions (hair: crystal) - crystal is mainly rutile. Grass into the crystal - mainly for tourmaline; liquid inclusions in quartz crystal with water; green light blue quartz containing rutile needles; milk quartz by fine water holes caused by turbidity; green quartz plate or fragmented chlorite, sometimes may be green needle like actinolite sand; Stone (Aventurine) - quartz rock containing green or red brown mica flakes, also known as Aventurine Aventurine, commonly known as black smoke. Smoke crystal common to dark brown, these rocks are mainly contains a large amount of radioactive uranium, thorium relations.
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