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The rarest pattern in Opals ever.. Natural Ethiopian Opal with Leopard / ring pattern.. the best example of this pattern known..
Há 3 dias · Amethyst is the purple variety of the quartz mineral species. It’s the gem that’s most commonly associated with the color purple, even though there are other purple gems such as sapphire and tanzanite. Its purple color can be cool and bluish, or a reddish purple that’s sometimes referred to as “raspberry.”. Most people think of ...
Há 5 dias · Topaz Description. This selection of gems from Ouro Prêto, Brazil, and Russia's Ural Mountains, displays the golden orange to pinkish red color range of precious topaz. The gems range from 7.61 to 14.33 carats in size. Many consumers know topaz as simply an inexpensive blue gem.
Há 5 dias · giaについて 科学と教育の伝統. 1931年に設立された米国宝石学会（gia）は、ダイヤモンド、カラーストーン、真珠の世界的権威とみなされています。gia は宝石とジュエリーの知識、基準、教育の主要な情報源であり、公益を目的とした非営利の研究機関です。
Há 5 dias · And of all the 4Cs, it is the most complex and technically difficult to analyze. The GIA Cut Grading System for the standard round brilliant diamond evaluates seven components. The first three, brightness, fire, and scintillation, consider the diamond's overall face-up appearance. The remaining four, weight ratio, durability, polish, and ...
Há 1 dia · Modern Perspectives. In contemporary gemology, the distinction between precious and semiprecious is seen as somewhat outdated and arbitrary. The Gemological Institute of America (GIA) and other authoritative bodies focus more on the intrinsic qualities of gemstones, such as their mineral composition, hardness, brilliance, and rarity, rather than fitting them into a dichotomous classification.
Welcome to the Ziskin Gems community.. Feel free to share pictures and videos of your favorite gems..This is a place to ask advice, post educational content, and buy/sell gemstones.. There are specific guidelines that must be followed. Sellers must be verified and approved. We aim for a well rounded sub that is not just for selling.. Any suggestions, feel free to message the MOD. Thanks for ...
