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Moonstone cabochon. The most common moonstone is of the orthoclase feldspar mineral adularia, named for an early mining site near Mt. Adular in Switzerland, now the town of St. Gotthard. [1] [better source needed] A solid solution of the plagioclase feldspar oligoclase +/− the potassium feldspar orthoclase also produces moonstone specimens.
The loupe also allows you to read any markings (if any exist) regarding gold and silver quality. For example, 10k, 14k, and 18k mean 10-carat, 14-carat, and 18-carat gold, and 925 indicates ...
From Brilliant Earth to Shane Co, we tracked down all the best places to shop for diamonds, gold, and casual jewelry.
Clasps to complete necklaces and bracelets; Earwires to link an earring to the wearer's ear; Ring blanks for making finger rings; Bails, metal loops, and jump rings, for completing jewellery. Jump rings can be used by themselves for chains; Pin stems and brooch assemblies; Tuxedo stud findings, letters of the alphabet, cluster settings, metal ...
Rare or unusual gemstones, generally understood to include those gemstones which occur so infrequently in gem quality that they are scarcely known except to connoisseurs, include andalusite, axinite, cassiterite, clinohumite, painite and red beryl. [27] Gemstone pricing and value are governed by factors and characteristics in the quality of the ...
Diamond clarity is the quality of diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called inclusions, and surface defects, called blemishes. Clarity is one of the four Cs of diamond grading, the others being carat , color , and cut .
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