Basic properties of semi precious stones
Feb 20, 2024| (1) The mineral name of a crystal is quartz.
(2) Chemical composition, the chemical composition of crystal is SiO2, and the crystal also contains trace amounts of Al, Tt, Fe plasma, presenting different colors.
(3) Morphology: Crystals belong to the triagonal crystal system, with rhombic, hexagonal, and triangular biconical aggregates. Horizontal stripes often develop on the crystal cylinder surface.
(4) Transparency, the transparency of crystals is related to their color. Colorless crystals have high transparency, which decreases as the color deepens.
(5) Gloss, the crystal has a typical glassy luster, and the fracture surface has a greasy luster.
(6) Hardness: The crystal has a relatively high and stable hardness, with an Hm of 7.
(7) The relative density of crystals is relatively low and stable, with a value of 2.65.