Smoky quartz
Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystal. Like other quartz gems, it is a silicon dioxide crystal. The smoky colour results from free silicon formed from the silicon dioxide by natural irradiation.
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Smoky quartz
Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystal. Like other quartz gems, it is a silicon dioxide crystal. The smoky colour results from free silicon formed from the silicon dioxide by natural irradiation.
has abstract
El cuarzo ahumado es una varie ...... o ahumado en sentido estricto.
@es
El quars fumat és una varietat ...... ol, en forma de panells plans.
@ca
Il quarzo affumicato o quarzo fumé è una varietà di quarzo.
@it
Kwarc dymny – minerał, odmiana ...... kryształu górskiego i morionu.
@pl
Le quartz fumé (anciennement ( ...... rieur au taux de destruction).
@fr
Quartzo fumado (no Brasil, qua ...... sia, Escócia, Suíça e Ucrânia.
@pt
Rauchquarz (oder Morion) ist e ...... dennoch relativ oft zu finden.
@de
Rookkwarts is een kwarts-varië ...... rianten worden morion genoemd.
@nl
Rökkvarts, ibland felaktigt ka ...... iktigt mörk kallas mineralet .
@sv
Smoky quartz is a brownish gre ...... ioxide by natural irradiation.
@en
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birefringence
+0.009
@en
category
cleavage
{0110} Indistinct
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colour
Brown to grey, opaque
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dana
diaphaneity
Transparent to nearly opaque
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formula
SiO2
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fracture
Conchoidal
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gravity
lustre
Vitreous – waxy to dull when massive
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name
Smoky quartz
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opticalprop
Uniaxial
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Other
lattice: hexagonal, Piezoelectric, may be triboluminescent, chiral
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pleochroism
weak, from red-brown to green-brown
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refractive
nε = 1.552–1.554
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nω = 1.543–1.545
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solubility
Insoluble at STP; 1 ppmmass at ...... mass at 500 °C and 1500 lb/in2
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streak
White
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symmetry
Trigonal 32
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system
α-quartz: trigonal trapezohedral class 3 2; β-quartz: hexagonal 622
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tenacity
Brittle
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twinning
Common Dauphine law, Brazil law and Japan law
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unit cell
a = 4.9133 Å, c = 5.4053 Å; Z=3
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wikiPageUsesTemplate
subject
hypernym
comment
El cuarzo ahumado es una varie ...... o ahumado en sentido estricto.
@es
El quars fumat és una varietat ...... ol, en forma de panells plans.
@ca
Il quarzo affumicato o quarzo fumé è una varietà di quarzo.
@it
Kwarc dymny – minerał, odmiana ...... stępują inkluzje igieł rutylu.
@pl
Le quartz fumé (anciennement ( ...... cette température, le taux de
@fr
Quartzo fumado (no Brasil, qua ...... sia, Escócia, Suíça e Ucrânia.
@pt
Rauchquarz (oder Morion) ist e ...... dennoch relativ oft zu finden.
@de
Rookkwarts is een kwarts-varië ...... rianten worden morion genoemd.
@nl
Rökkvarts, ibland felaktigt ka ...... iktigt mörk kallas mineralet .
@sv
Smoky quartz is a brownish gre ...... ioxide by natural irradiation.
@en
label
Cuarzo ahumado
@es
Fumkvarco
@eo
Kwarc dymny
@pl
Quars fumat
@ca
Quartz fumé
@fr
Quartzo fumado
@pt
Quarzo affumicato
@it
Rauchquarz
@de
Rookkwarts
@nl
Rökkvarts
@sv
sameAs
wasDerivedFrom
isPrimaryTopicOf
name
Smoky quartz
@en