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F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
Silicate minerals
SiO2
04.DA.05
75.01.03.01
α-quartz: trigonal trapezohedral class 3 2; β-quartz: hexagonal 622[1]
Trigonal 32
a = 4.9133 Å , c = 5.4053 Å; Z=3
Brown to grey, opaque
6-sided prism ending in 6-sided pyramid (typical), drusy, fine-grained to microcrystalline, massive
Common Dauphine law, Brazil law and Japan law
{0110} Indistinct
Conchoidal
Brittle
7 – lower in impure varieties (defining mineral)
Vitreous – waxy to dull when massive
White
Transparent to nearly opaque
2.65; variable 2.59–2.63 in impure varieties
Uniaxial (+)
n ω = 1.543–1.545 n ε = 1.552–1.554
+0.009 (B-G interval)
weak, from red-brown to green-brown
1670 °C (β tridymite ) 1713 °C (β cristobalite )[1]
Insoluble at STP ; 1 ppmmass at 400 °C and 500 lb/in2 mass at 500 °C and 1500 lb/in2 [1]
lattice: hexagonal , Piezoelectric , may be triboluminescent , chiral (hence optically active if not racemic)
[2] [3] [4] [5]
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 crystals.[6] [7]
Varieties [ edit ]
Morion is a very dark brown to black opaque variety. Morion is the German, Danish, Spanish and Polish synonym for smoky quartz.[8] mormorion in Pliny the Elder .[9]
Cairngorm is a variety of smoky quartz found in the Cairngorm Mountains of Scotland .[10] jewellery and as a decoration on kilt pins and the handles of sgianan-dubha anglicised : sgian-dubhs or skean dhu ).[11] lb ) specimen kept at Braemar Castle .[citation needed
Smoky quartz is common and was not historically important, but in recent times it has become a popular gemstone , especially for jewelry .[12]
Sunglasses , in the form of flat panes of smoky quartz, were used in China in the 12th century.[13]
See also [ edit ]
References [ edit ]
^ a b c Deer, W. A., R. A. Howie and J. Zussman, An Introduction to the Rock Forming Minerals , Logman, 1966, pp. 340–355 ISBN 0-582-44210-9
^ Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (eds.). "Quartz". Handbook of Mineralogy (PDF) . Vol. III (Halides, Hydroxides, Oxides). Chantilly, VA, US: Mineralogical Society of America. ISBN 0962209724
^ Quartz . Mindat.org. Retrieved on 2013-03-07.
^ Quartz . Webmineral.com. Retrieved on 2013-03-07.
^ Hurlbut, Cornelius S.; Klein, Cornelis (1985). Manual of Mineralogy ISBN 0-471-80580-7
^ "Smoky Quartz: Smoky Quartz mineral information and data" .
^ "Smoky Quartz: A transparent brown gem & gem material" .
^ http://www.mindat.org/min-6270.html Morion on Mindat
^ New Oxford American Dictionary (2nd ed., 2005), p. 1102.
^ Shaw, Philip; Thompson, Des B. A. (12 June 2006). The Nature of the Cairngorms: Diversity in a Changing Environment ISBN 978-0-11-497326-1
^ Chisholm, Hugh , ed. (1911). "Cairngorm" Encyclopædia Britannica
^ "The Gemstone Smoky Quartz" . minerals.net . Retrieved 14 December 2015 .
^ Joseph Needham, Science & Civilisation in China (Cambridge, England: Cambridge University Press, 1962), volume IV, part 1, page 121. Needham states that dark glasses were worn by Chinese judges to hide their facial expressions during court proceedings.
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e
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Smoky_quartz&oldid=1214873127 " C a t e g o r i e s : ● Q u a r t z g e m s t o n e s ● M i n e r a l s t u b s H i d d e n c a t e g o r i e s : ● C S 1 : l o n g v o l u m e v a l u e ● W i k i p e d i a a r t i c l e s i n c o r p o r a t i n g a c i t a t i o n f r o m t h e 1 9 1 1 E n c y c l o p a e d i a B r i t a n n i c a w i t h W i k i s o u r c e r e f e r e n c e ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n i s d i f f e r e n t f r o m W i k i d a t a ● A r t i c l e s c o n t a i n i n g S c o t t i s h G a e l i c - l a n g u a g e t e x t ● A l l a r t i c l e s w i t h u n s o u r c e d s t a t e m e n t s ● A r t i c l e s w i t h u n s o u r c e d s t a t e m e n t s f r o m N o v e m b e r 2 0 2 0 ● C o m m o n s l i n k f r o m W i k i d a t a ● A l l s t u b a r t i c l e s
● T h i s p a g e w a s l a s t e d i t e d o n 2 1 M a r c h 2 0 2 4 , a t 1 8 : 4 0 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
Media related to Smoky quartz at Wikimedia Commons
Works related to EB1911:Cairngorm at Wikisource
