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other names: /
mineral class: Oxides
chemical formula: SiO2 (Silicon dioxide)
Chemical elements: Silicon, oxygen
Similar minerals: Ametrine
shine: Glass gloss to greasy
crystal structure: trigonal
mass density: 2,65
magnetism: not magnetic
Mohs hardness: 7
stroke color: White
General information about the Amethyst:
Of the amethyst describes a crystal quartz counted to the oxides, which stands out by its unmistakable violet coloring and is therefore considered the most popular stone among the quartz. The name amethyst comes from the Greek and means translated as "not drunk", because in ancient Greece, people were convinced that the stone protected against the intoxicating effects of wine. Made of silicon dioxide, the mineral may appear in various shades of violet, a light gray violet, pink, blue with a violet tint or black, has a greasy glaze and mussel break and is depending on the copy of delicate transparent to translucent. The coloring is due to the iron ions contained in the amethyst, which are surrounded by oxygen ions and produce a lattice defect. Also, the radiation emitted by radioactive rocks in the immediate vicinity of an amethyst has a positive influence on the luminous violet of the stone. The stronger the coloring, the more valuable is the amethyst. Heating and the influence of direct sunlight cause the stone to lose its characteristic and intense color or take on a yellow, blue or brown tint
Occurrence and localities:
The amethyst is found worldwide and is one of the most widely used minerals, with suitable transparent specimens are comparatively rare for jewelry. Amethyst glands are primarily found in cavities in rock strata with large accumulations of water or in volcanic rocks. The largest cavity to date with multi-meter-high amethyst glands was found in 1900 near Rio Grande do Sul. In addition to Brazil, Sri Lanka, Russia, Uruguay, Madagascar, Zambia and Lower Austria, where amethysts have been mined near Maissau for over 150 years, are among the countries in which important sites are located. The most important site in Germany, the Steinkaulenberg, is now due to the large deposits in Brazil only as a mine in operation.
History and usage:
Dark purple amethysts have historically been considered extremely valuable gemstones especially prized by clerics and Czarina Catherine the Great. Thanks to its high abundance, it is now much cheaper but still in great demand as a gemstone cut. In esotericism, the stone has been attributed a magical and health significance since antiquity. As a so-called dresser stone or stone of Bacchus, he served thanks to the sobering effect attributed to him by the Greeks and Romans as a material for the production of precious wine goblets to mitigate the intoxicating effect of alcoholic beverages. To date, the amethyst is considered a protective against alcohol and drug addiction.