Do you know these uses of quartz stone

The name of the quartz is an ancient German mining term, meaning not clear. It is a travertine, the chemical composition of SiO2, crystal hexagonal column and rhombohedral body and other simple form of the poly, crystal cylinder often stripes. Triangular system. Hardness is 7. Has a typical glass luster. No cleavage, shell-like fracture. According to the degree of crystallization of quartz can be divided into three categories: significant crystal, aphanitic and amorphous. Colorless, transparent quartz variants, the Greeks called "Krystallos", meaning "white ice", they are sure that quartz is durable and sturdy ice. Ancient Chinese people think that the mouth with cold crystals can quench thirst.

quartz is one of the most widely distributed minerals on the Earth's surface, as travertine, its use is quite extensive. Far in the Stone Age, people use it to produce stone axes, stone arrows and other simple production tools to hunt food and fight the enemy. Quartz glass can be used as standard frequency; made after melting glass, can be used for the production of optical instruments, glasses, glass tubes and other products; can also do precision instruments of bearings, grinding materials, glass ceramics, etc. Industrial raw materials.

quartz crystal contains small bubbles or liquid filling cracks, will produce rainbow through the interference light, can be made of fine jewelry. Napoleon's wife Empress Josephine (Empress Josephine) has a dazzling collection of precious stones, is made of rainbow quartz jewelry.

Quartz is a physical property and chemical properties are very stable mineral resources, the crystal is a triad of oxide minerals, that is, low temperature quartz (a-quartz), is the most widely distributed quartz mineral species. The generalized quartz also includes high temperature quartz (b-quartz). Stone block, also known as silica, is mainly the production of quartz sand (also known as silica sand) of raw materials, but also quartz refractory materials and ferrosilicon raw materials.

Quartz chemical formula for the SiO2, the main component of natural quartz, often contain a small amount of impurities such as Al2O3, IMO, CaO, MgO and so on. It has many types. Ceramics for the daily use of quartz, quartz sand, quartzite, sandstone, silica, opal, diatomaceous earth, rice shell ash is also rich in SiO2.

quartz appearance is often white, milky white, gray translucent state, Mohs hardness of 7, section with glass luster or fat luster, the proportion varies by crystal, change between 2.22-2.65. With ordinary sand, crystal is "with the mother of a" kind of material. When the silica crystal is perfect crystal; silica gel dehydration is agate; silica water colloid after solidification to become opal; as travertine, the chemical molecules of silicon dioxide grains less than a few microns, the composition of jade Marrow, flint, secondary quartzite.

From：travertine