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Smoky Quartz

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Formula:
SiO
 
2
Colour:gray, brown, black
A variety of Quartz

Smoky-gray, brown to black quartz colored by Aluminum-based and irradiation-induced color centers.
The name Morion is used for black smoky quartz.


Dichroism in Smoky Quartz

Smoky quartz is dichroic (from darker yellow-brown to lighter red-brown) when viewed in polarized light. The photo to the left shows the change of color in a smoky quartz crystal that is rotated in front of a LCD display that serves as a source of polarized light.


Black quartz crystals in anhydrite from Camporanda, Tuscany, Italy. These are not smoky quartz
Note: Very often black or brown crystals that are colored by inclusions of minerals or organic matter are erroneously called "smoky quartz" or "morion". Typical examples of such misnomers are black quartz crystals embedded in sedimentary rocks, as those found in gypsum, anhydrite and limestone in Italy and Spain.


Visit gemdat.org for gemological information about Smoky Quartz. Currently in public beta-test.

Classification of Smoky Quartz

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Physical Properties of Smoky Quartz

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:gray, brown, black
Comment:dichroic: darker yellow-brown to lighter red-brown

Chemical Properties of Smoky Quartz

Formula:
SiO
 
2
Simplified for copy/paste:SiO2
Essential elements:O, Si
All elements listed in formula:O, Si

Other Names for Smoky Quartz

Synonyms:
CairngormCairngorum StoneColorado DiamondOuro Verde QuartzQuarzo affumicato
Radium DiamondSmokey QuartzSmoky CitrineSmoky Topaz
Other Languages:
Danish:Morion
Dutch:Rookkwarts
Estonian:Moorion
French:Quartz fumée
German:Morion
Rauchquarz
Rauchtopas
Italian:Morione
Latvian:Morions
Lithuanian:Morionas
Norwegian (Bokmål):Røykkvarts
Polish:Morion
Portuguese:Quartzo morion
Russian:Морион
Simplified Chinese:烟水晶
烟晶
烟石英
茶晶
茶水晶
Slovak:Morión
Spanish:Morion
Swedish:Rökkvarts
Traditional Chinese:煙水晶
煙晶
煙石英
茶晶
茶水晶

Other Information

Health Warning:Quartz is usually quite harmless unless broken or powdered. Broken crystals and masses may have razor-sharp edges that can easily cut skin and flesh. Handle with care. Do not grind dry since long-term exposure to finely ground powder may lead to silicosis.

References for Smoky Quartz

Reference List:

- +
Marshall, Royal R. (1955): Absorption spectra of smoky quartz from an Arkansas vein deposit and from a Sierran miarolitic granite. Am. Min.: 40: 535-537.

Chudoba, K. F. (1962): Some relations between the causes of amethyst, smoky quartz, and citrine colors as given by modern science. Mineralogicheskii Sbornik (Lvov), (16), 91-105.

Cohen, Alvin J. (1989): New data on the cause of smoky and amethystine color in quartz. Mineralogical Record 20, 365-367.

Internet Links for Smoky Quartz

Search Engines:
  • Look for Smoky Quartz on Google
  • Look for Smoky Quartz images on Google
  • Mineral Dealers:
  • Fabre Minerals - search for Smoky Quartz specimens
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy from McDougall Minerals
  • Fine and rare minerals from mintreasure.com
  • rare and unusual minerals mainly crystallized
  • Lapis Mineral Magazin
  • SpiriferMinerals.com - high quality low prices
  • Fine minerals from bisbeeborn.com
  • Fine Minerals from Weinrich Minerals, Inc.
  • Buy from David K Joyce minerals
  • Smoky Quartz specimens for sale - minfind.com
  • Search for Smoky Quartz on Well-Arranged Molecules
  • Specimens:The following Smoky Quartz specimens are currently listed for sale on minfind.com.

    Localities for Smoky Quartz

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