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From Wikipedia, the free encyclopedia

Smoky quartz
General
CategorySilicate minerals
Formula
(repeating unit)
SiO2
Strunz classification04.DA.05
Dana classification75.01.03.01
Crystal systemα-quartz: trigonal trapezohedral class 3 2; β-quartz: hexagonal 622[1]
Space groupTrigonal 32
Unit cella = 4.9133 Å, c = 5.4053 Å; Z=3
Identification
ColourBrown to grey, opaque
Crystal habit6-sided prism ending in 6-sided pyramid (typical), drusy, fine-grained to microcrystalline, massive
TwinningCommon Dauphine law, Brazil law and Japan law
Cleavage{0110} Indistinct
FractureConchoidal
TenacityBrittle
Mohs scale hardness7 – lower in impure varieties (defining mineral)
LustreVitreous – waxy to dull when massive
StreakWhite
DiaphaneityTransparent to nearly opaque
Specific gravity2.65; variable 2.59–2.63 in impure varieties
Optical propertiesUniaxial (+)
Refractive indexnω = 1.543–1.545
nε = 1.552–1.554
Birefringence+0.009 (B-G interval)
Pleochroismweak, from red-brown to green-brown
Melting point1670 °C (β tridymite) 1713 °C (β cristobalite)[1]
SolubilityInsoluble at STP; 1 ppmmass at 400 °C and 500 lb/in2 to 2600 ppmmass at 500 °C and 1500 lb/in2[1]
Other characteristicslattice: hexagonal, Piezoelectric, may be triboluminescent, chiral (hence optically active if not racemic)
References[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] The color of smoky quartz is produced when natural radiation, emitted from the surrounding rock, activates color centers around aluminum impurities within the crystalline quartz. [7]


YouTube Encyclopedic

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  • Irradiated Healing Crystals - Using Caution with Smoky Quartz & Hiddenite (April 4, 2012)
  • How does radiation affects minerals?
  • Smoky Quartz Meaning Benefits and Spiritual Properties

Transcription

Another common treatment with crystals is actually, believe it or not, irradiation. So stones are naturally irradiated in the earth all the time. That's how clear quartz turns to smoky quartz. And this is a natural process, and by the time the crystals are excavated from the earth, there's no trace of harmful radiation left so the stones are perfectly safe to bring into your energy field or use on your physical body. However, there are some instances where crystals are irradiated by man to get a similar effect. One of these, for example, is clear quartz. So clear quartz is irradiated within the earth and turned to smoky quartz. But sometimes you'll find, especially with quartz from Arkansas, and sometimes with different minerals from China, particularly different types of quartz crystals, they will be irradiated by man. And one way to tell these apart from regular quartz or smoky quartz crystals is if you actually hold the irradiated smoky quartz up to the light, you will not be able to see through it. It will appear opaque, and they're very very dark in color - almost black. Now with natural smoky quartz crystals, there's really quite a bit of range in the natural color, but you should always be able to see through them when you hold them up to the light. And this is a very good testing method to use. Now the reason this is important is because sometimes when these crystals are irradiated by man, they will still be radioactive. Now all these things are supposed to be thoroughly checked before they're sold to the general public, but it's very very hard to keep the regulation on that going. So you need to be cautious and know what you're buying, buy from a reputable dealer. But a good way to tell, again, is to hold that crystal up to the light. If you can't see through it, I would not recommend using that stone for healing. In my opinion, I feel like the artificially irradiated stones are just sort of energetically dead because what they're doing is exposing those crystals to a large amount of radiation all at once. Whereas the crystals that are naturally irradiated in the earth are exposed to only very small doses of radiation. And that's why they're generally safer to use. Now you do you want to be especially cautious if you're using stones that come in from China. Again, particularly quartz-based minerals because not all of those stones are checked in customs. Adn you want to make sure that you're using things that are going to be safe for you. Similarly, in addition to the quartz being irradiated to become smoky quartz, Hiddenite, which is a green variety of Spudomene, is being imported from Pakistan and it is often irradiated to enhance the green color. So Hiddenite is actually the green cousin to Kunzite, and you want to make sure that if you're bringing this Hiddenite into your energy field, that you know that it's free from artificial radiation. Because a lot of times these minerals are still radioactive when we bring them into this country. So, you know, unfortunately not every single mineral can be checked, so you just want to use extra caution. I think if you have experience with your pendulum and you feel comfortable using it in this way, then you could check to see if your crystal has been irradiated. But generally just knowing a little bit about which stones are commonly irradiated will save you a lot of trouble. So again, that's smoky quartz, Hiddenite is a big one right now. There's also a green quartz from China, and it's often mistaken for Seraphose quartz which comes off of an island off of the coast of Greece. And Seraphose is amazing, but there's a green Quartz from China that is irradiated to take on the appearance of the Seraphose quartz. And I've had many instances of hearing horror stories about how this stone is still radioactive when enters the country, so just be careful. If you'd like to try and use your pendulum if you really not sure, I think that you have to be well-versed in using a pendulum. If you're not experienced, you may not get a clear answer. So again, that's just sort of on your own comfort level. Again though, especially if it's a smoky quartz, holding it up to the light and doing the test that way works really well. Or if it is a Hiddenite and it looks just too green to be true, you make sure to ask your dealer or vendor if it has been irradiated and a reputable dealer should be able to tell you. Now the only thing is you do have to be cautious because some people are just trying to sell you crystals and they'll tell you anything you want to hear about a specific stone. So just make sure that you are, you know, you're using your best judgment when it comes to that.

Varieties

Morion is a very dark brown to black opaque variety. Morion is the German, Danish, Spanish and Polish synonym for smoky quartz.[8] The name is from a misreading of mormorion in Pliny the Elder.[9]

Cairngorm is a variety of smoky quartz found in the Cairngorm Mountains of Scotland.[10] It usually has a smoky yellow-brown colour, though some specimens are greyish-brown. It is used in Scottish jewellery and as a decoration on kilt pins and the handles of sgianan-dubha (anglicised: sgian-dubhs or skean dhu).[11] The largest known cairngorm crystal is a 23.6 kg (52 lb) specimen kept at Braemar Castle.[citation needed]

Uses

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

References

  1. ^ 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
  2. ^ 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.
  3. ^ Quartz. Mindat.org. Retrieved on 2013-03-07.
  4. ^ Quartz. Webmineral.com. Retrieved on 2013-03-07.
  5. ^ Hurlbut, Cornelius S.; Klein, Cornelis (1985). Manual of Mineralogy (20 ed.). ISBN 0-471-80580-7.
  6. ^ "Smoky Quartz: Smoky Quartz mineral information and data".
  7. ^ "Smoky Quartz: A transparent brown gem & gem material".
  8. ^ http://www.mindat.org/min-6270.html Morion on Mindat
  9. ^ New Oxford American Dictionary (2nd ed., 2005), p. 1102.
  10. ^ Shaw, Philip; Thompson, Des B. A. (12 June 2006). The Nature of the Cairngorms: Diversity in a Changing Environment. The Stationery Office. p. 22. ISBN 978-0-11-497326-1.
  11. ^ Chisholm, Hugh, ed. (1911). "Cairngorm" . Encyclopædia Britannica. Vol. 4 (11th ed.). Cambridge University Press. p. 952.
  12. ^ "The Gemstone Smoky Quartz". minerals.net. Retrieved 14 December 2015.
  13. ^ 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.

External links


This page was last edited on 21 March 2024, at 18:40
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