The story about the quartz

Quartz is a physical and chemical properties of mineral resources are very stable, crystal belongs to trigonal system of oxide minerals, ie, low temperature quartz (a-quartz), quartz the most widely distributed group minerals in a mineral species. Generalized include a high-temperature quartz quartz (b-quartz). Quartz block, also known as silica, is the production of quartz sand (also known as silica sand) of raw materials, but also quartz refractories and firing ferrosilicon raw materials.
Quartz chemical formula SiO2, the main component of natural quartz stone quartz, which often contain a small amount of impurities such as Al2O3, IMO,, CaO, MgO, etc. There are various types. Ceramics are used in raw materials quartz, quartz sand, quartzite, sandstone, silica, opal, diatomaceous earth, etc., are also rich in rice shell ash SiO2. Often has the appearance of white quartz, white, gray translucent state, Mohs hardness of 7, broken glass mask shiny gloss or fat, the proportion varies due to crystal, changes in between 2.22-2.65. With the ordinary sand, crystal is "from the same womb" of a substance. When the time is perfect crystalline silica crystal; silica gel dehydration is the agate; aqueous colloidal silica after solidification become opal; silica grains smaller than a few microns, on the formation of chalcedony, flint, secondary quartzite.
Means plasticity quartz material, with the clay in the heat generated porcelain mullite crystals gives a high mechanical strength and chemical stability, and can increase the translucency of the body, is the preparation of a good glaze raw materials.
King City, Republic of multi-use Sambo Punta produced quartz, the new China was founded mostly used planetesimals are chang, Xiushui quartz and other places, especially after 2000, the amount of surge. Glaze was 10% -30%, should be washed before use chosen to remove dirt impurities on the kiln calcination, easy smash.
Colorless and transparent quartz variant, the Greeks called "Krystallos", meaning "white ice", they were convinced that quartz is durable and rugged ice. Ancient Chinese people believe that on the mouth with cold crystal to thirst.
Quartz is the most widely distributed of the Earth's surface minerals, its use is also quite extensive. Far in the Stone Age, people use it to make stone axes, arrows and other simple tools of production, in order to hunt for food and fight against enemies. Clock, the electronic device used as the standard of the piezoelectric quartz frequency; molten glass is made, can be used for making optical instruments, glasses, glass and other products; precision instruments can be done bearing, abrasive materials, glass, ceramics, etc. industrial raw materials.
Quartz body contains tiny bubbles or liquid filling cracks, it will pass interference light generated rainbow, can be made into fine jewelry. Napoleon's wife, Empress Josephine (Empress Josephine) has a dazzling jewel collection is made of quartz rainbow jewelry.