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Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.
Bracelet in platinum, white gold, silver, diamonds, lapislazuli, turquoise, by Cartier Paris, 1937. Growing political tensions, the after-effects of the war, and a reaction against the perceived decadence of the turn of the 20th century led to simpler forms, combined with more effective manufacturing for mass production of high-quality jewellery.
Finally, lazulite is sometimes used not only as an ornamental stone, but also for jewelry cutting, although finds of high-quality raw materials are too rare for its mass use. As for turquoise , it has been one of the most popular ornamental and semi-precious stones since ancient times.
July is a busy month for high jewelry unveilings - here, we take a look at some of the best and brightest from luxury and fine jewelry brands. 8 Incredible New Pieces from High Jewelry Brands Skip ...
International Gemological Institute (IGI), independent laboratory for grading and evaluation of diamonds, jewelry, and colored stones; Hoge Raad Voor Diamant (HRD Antwerp), The Diamond High Council, Belgium is one of Europe's oldest laboratories; its main stakeholder is the Antwerp World Diamond Centre
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