Quartz stone is a kind of building stone product widely used in the modern construction industry. Quartz rock formed by different original rocks can be distinguished according to structure, crystallographic degree, by-product, rock symbiotic combination, and occurrence.
For example, quartzite formed from a single mineral quartz Sand rock has a coarse grain size, a typical balanced mosaic structure, and contains more accessory minerals such as zircon; Quartzite formed from siliceous rocks, even if subjected to high-grade metamorphism, rarely has a mineral particle size greater than 0.2 mm, and has a toothed alternating structure, generally without accessory minerals.
According to the quartz content, quartzite can be divided into two types:
- Feldspar quartzite, with a quartz content of more than 75%, often contains feldspar, mica, and other minerals, and feldspar content is generally less than 20%. If the feldspar content increases, it will transition to hypabyssal rock.
- Quartzite, with a quartz content of more than 90%, contains a small amount of mica, feldspar, magnetite, and other minerals.
Quartz stone can be divided into ordinary quartz sand, refined quartz sand, high-purity quartz sand, fused quartz sand, and silica powder.
In the process of magma intrusion and evolution, due to the change in temperature, pressure, and other conditions, the magma differentiated SiO2-rich hydrothermal solution, penetrated the surrounding rock metamorphic rock series along bedding and fractures, or intruded along the contact fracture zone of the previous magmatic rock, forming vein shaped quartzite ore body.