Quartz is a large group of gemstones, which includes a commercially available crystal, rose quartz, amethyst, citrine and smoky quartz. Chemical formula of quartz is known to all a formula SiO2, or silica. This oxide is also part of other minerals, which generally call the quartz group. These groups consist of quartz very rare minerals that are rare in its structure, even if they have similar chemical composition. Minerals from naturshop.cz similar properties are called polymorphic (which means more forms) and these minerals are only stable under high pressure or temperature, or both once.  

Quartz on Earth 

Quartz crystals form in nature and they are widespread throughout the world. Quartz accounts for approximately 60% of the earth's surface, and if this seems a bit much, I will give an example of a typical quartz grain of sand. Silica sand found its application in many industries, without which we could not have done today. The largest use of sand is of course in construction as part of building materials, in the glass industry, where the melted glass sand for the manufacture of glass, and the Foundry Industry, where sand is used as an essential component in the production of molds for casting incandescent materials. source naturshop.cz 

Types of quartz

The best known site of large quartz crystals depends on the color modes:

Crystal 

The most widely used is the quartz crystal that is clear in color, and the largest deposits in the world are in Madagascar, Brazil, USA, Switzerland, Russia and the Czech Republic. The naturshop.cz you can choose from a wide range of crystals from around the world.  

Rose quartz

Pink rose quartz sold on the online store naturshop.cz find the most in Brazil, Madagascar, India, Namibia, USA, and in Europe, we need to appoint Russia, Kazakhstan and small quantities and in the Czech Republic. 

Amethyst

Purple Amethyst is the most mined in Brazil, where it is known as amethyst geodes, which are ovoid bodies with crystals pointing inward are really good quality Amethyst from Uruguay. Another site offered amethysts from naturshop.cz are Madagascar, Canada, USA, Bolivia, India, in Africa, in Zimbabwe. source naturshop.cz In Asia, particularly in China and Sri Lanka, in Europe, especially in Russia and Germany, and a tiny amount can also be found in the Czech Republic. 

Citrine 

Sun-yellow citrine of naturshop.cz comes from Madagascar, also from Brazil, USA, Russia and France 

Smoky Quartz:

Dark smoky quartz offered on naturshop.cz come from Madagascar, Brazil, USA (Colorado), in Europe in Scotland or the Swiss Alps.

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Author: Naturshop.cz