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WHAT IS QUARTZ?

Quartz — SiO2

Natural quartz is a widespread mineral and one of the base components of the rocks.

It was Theophrastus Paracelsus and then Pliny who firstly mentioned quartz considering it to be a petrified ice.

There are few versions of the word “quartz” origin:

  1. From the Saxonic “querkluflertz” that means cross-section veins to German “querertz” than to modern “quarz”.
  2. From the proto-Celtic name of crystal quartz mineral “cross-course-spar”.
  3. From Vends language “twardy” meant firm, hard.

However, Irish language calls quartz “grian cloch” and this means sun stone.


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The types of natural quartz

The scientists distinguish several types of quartz minerals depending from crystal structure: b- christobalite, b-tridymite, a-quartz, b-quartz, b1-tridymite, a-tridymite, a-christobalite, coesite, stishovite, keatite. Meantime there are only few of them in nature. The most common type of quartz is so called ?-quartz and that is the sort we are extracting from the ore in Kyshtym

Crystals and grains of natural quartz may have various colors: the most common are colorless, milk or grey. Clear or limpid quartz with color gradations have different names: transparent, clear is called rock crystal, violet – amethyst, smoke-colored – rauchtopas, black – morion, golden yellow – citrin. The agate and chalcedony are cryptocrystalline form of silica consists of very fine intergrowths of the quartz and some other minerals in the crystal body.

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