High Performance Rock Specimens Nature Rock Crystal Quartz Stone

Crystal (Quartz Crystal) is a colorless and transparent quartz crystal minerals large. Its main chemical ingredient is silica. Chemical formula SiO2. Crystal colorless, purple, yellow, green and smoked like. Shiny glass. Transparent to translucent. Hardness 7. Brittle. No cleavage. Crystal Density: 2.56-2.66 g / cc.
Crystal is a substance with ordinary sand "with a womb," the. When the time is perfect crystalline silica crystal; after dehydration is agate gelled silica; colloidal silica water after solidification become opal; silica grains at less than a few microns, on the formation of chalcedony, flint, secondary quartzite.
Pure colorless and transparent quartz crystal is a variant.
Our main minerals, rocks, fossils, semi-precious stones, etc all kinds of specimens as well as a variety of original rock of mineral raw materials, all kinds of stone crafts. Our products are from the original natural stone, so there are little differences between various stone, because nature is not a natural stone is the same.