Quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant of the minerals and mineral groups that compose the Earth's lithosphere, with the feldspars making up 41% of the lithosphere by weight, followed by quartz making up 12%, and the pyroxenes at 11%.
Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at 573 °C (846 K; 1,063 °F). Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold.
There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Europe and Asia.
Quartz is the mineral defining the value of 7 on the Mohs scale of hardness, a qualitative scratch method for determining the hardness of a material to abrasion.
TORSADE #2
- 2025-01-17T00:00:00.000000Z
KTM
- 2025-07-18T00:00:00.000000Z
Rewind
- 2025-06-19T00:00:00.000000Z
Attraction
- 2025-04-18T00:00:00.000000Z
Mango
- 2025-02-21T00:00:00.000000Z
Walk Or Die
- 2025-01-17T00:00:00.000000Z
Old School
- 2024-12-13T00:00:00.000000Z
Bomboclaat
- 2024-10-25T00:00:00.000000Z
Paris
- 2024-08-16T00:00:00.000000Z
Lovers
- 2024-07-12T00:00:00.000000Z
RAH
- 2024-06-14T00:00:00.000000Z
Radiant
- 2024-05-24T00:00:00.000000Z
Similar Artists