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Souza, Tamires P.; Watte, Guilherme; Gusso, Alaíde M.; Souza, Rafaela; Moreira, José da S.; Knorst, Marli M. (June 2017). "Silicosis prevalence and risk factors in semi-precious stone mining in Brazil". American Journal of Industrial Medicine. 60 (6): 529–536. doi: 10.1002/ajim.22719. PMID 28514023. S2CID 24375063. Marcell N. Smith (1913), Diamonds, Pearls and Precious Stones Griffith Stillings Press, Boston, Mass., p. 74 Contrary to popular belief, you don’t have to believe in a specific ideology to go on a spiritual sojourn. Your world is strongly connected to the cosmos and spiritual realms just waiting to provide wisdom. All you have to do is let it in! a b Geary, T.F.; Whalen, D. (2008). The Illustrated Bead Bible: Terms, Tips & Techniques. Sterling Pub. p.69. ISBN 9781402723537. Archived from the original on January 16, 2021 . Retrieved July 19, 2015. Sobek, Andrew R. "Apparatus for growing single crystals of quartz", U.S. Patent 2,674,520; filed: 11 April 1950; issued: 6 April 1954.
Prasiolite, an olive colored material, is produced by heat treatment; [70] natural prasiolite has also been observed in Lower Silesia in Poland. [71] Although citrine occurs naturally, the majority is the result of heat-treating amethyst or smoky quartz. [70] Carnelian has been heat-treated to deepen its color since prehistoric times. [72] The largest documented single crystal of quartz was found near Itapore, Goiaz, Brazil; it measured approximately 6.1m × 1.5m × 1.5m and weighed 39,916 kilograms. [81] Mining [ edit ]Blue Quartz is a stone that can easily adjust to whoever holds it. However, its healing properties resonate more with specific zodiac signs. Inclusions of the mineral dumortierite within quartz pieces often result in silky-appearing splotches with a blue hue. Shades of purple or grey sometimes also are present. "Dumortierite quartz" (sometimes called "blue quartz") will sometimes feature contrasting light and dark color zones across the material. [53] [54] "Blue quartz" is a minor gemstone. [53] [55] Citrine [ edit ] Usually blue in colour, dumortierite can also be a greenish-blue, purplish-blue and pink. It is very pleochroic, however magnification is recommend to see this as the crystals are so small. These inclusions are very popular among collectors. Quartz Inclusions: Epidote Platonov, Alexej N.; Szuszkiewicz, Adam (1 June 2015). "Green to blue-green quartz from Rakowice Wielkie (Sudetes, south-western Poland) – a re-examination of prasiolite-related color varieties of quartz". Mineralogia. 46 (1–2): 19–28. Bibcode: 2015Miner..46...19P. doi: 10.1515/mipo-2016-0004. Because natural quartz is often twinned, synthetic quartz is produced for use in industry. Large, flawless, single crystals are synthesized in an autoclave via the hydrothermal process. [73] [40] [33]
McClure, Tess (17 September 2019). "Dark crystals: the brutal reality behind a booming wellness craze". The Guardian. ISSN 0261-3077 . Retrieved 25 September 2019. Magnesium Aluminium Phosphate (MgAl2(PO4)2(OH)2) blue, bright blue, greenish-blue to bluish-white in colour. Forms in the monoclinic crystal system and has a prismatic habit, sometimes with pyramidal terminations and usually short, stout crystals. One of the less common inclusions in quartz. Quartz Inclusions: Piemontite Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (eds.). "Quartz" (PDF). Handbook of Mineralogy. Vol.III (Halides, Hydroxides, Oxides). Chantilly, VA: Mineralogical Society of America. ISBN 0962209724. Archived (PDF) from the original on 1 April 2010 . Retrieved 21 October 2009.Amethyst can fade in tone if overexposed to light sources, and can be artificially darkened with adequate irradiation. [4] It does not fluoresce under either short-wave or long-wave UV light. While the majority of quartz crystallizes from molten magma, quartz also chemically precipitates from hot hydrothermal veins as gangue, sometimes with ore minerals like gold, silver and copper. Large crystals of quartz are found in magmatic pegmatites. [40] Well-formed crystals may reach several meters in length and weigh hundreds of kilograms. [77] Crystal Data, Determinative Tables, ACA Monograph No. 5, American Crystallographic Association, 1963 Additionally, there is a rare type of pink quartz (also frequently called crystalline rose quartz) with color that is thought to be caused by trace amounts of phosphate or aluminium. The color in crystals is apparently photosensitive and subject to fading. The first crystals were found in a pegmatite found near Rumford, Maine, US and in Minas Gerais, Brazil. [63] The crystals found are more transparent and euhedral, due to the impurities of phosphate and aluminium that formed crystalline rose quartz, unlike the iron and microscopic dumortierite fibers that formed rose quartz. [64] Smoky quartz [ edit ]
Most crystal practitioners seek out Blue Quartz for its rejuvenating energy that influences the mind and spirit. However, that doesn’t mean it’s devoid of physical perks. Byrappa, K. and Yoshimura, Masahiro (2001) Handbook of Hydrothermal Technology. Norwich, New York: Noyes Publications. ISBN 008094681X. Chapter 2: History of Hydrothermal Technology.
Hazard Alert - Worker Exposure to Silica during Countertop Manufacturing, Finishing and Installation (PDF). DHHS (NIOSH). p.2 . Retrieved 27 November 2019.
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