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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 ...
This is a list of gemstones, organized by species and types. Minerals. There are over 300 types of minerals that have been used as gemstones. Such as: A–B
Bahia Emerald [2]; Carolina Emperor, [3] [4] 310 carats uncut, 64.8 carats cut; discovered in the United States in 2009, resides in the North Carolina Museum of Natural Sciences, Raleigh, NC, US
The Natural History Museum of Los Angeles County's latest jewelry show is one of the most spectacular precious stone exhibitions you're likely to see.
All of June's gemstone options are exceptionally rare and valuable. Jarmon explains their scarcity: "Alexandrite is very rare and very expensive—it is considered to be one of the rarest ...
It is considered among the rarest of all gemstones. [6] [4] The Swiss Gemmological Institute has described it as "a unique treasure of nature" and praised its "well-proportioned cut, highly attractive colour and fine purity". [5] The Gubelin Gem Lab in Lucerne stated that "such a combination of characteristics is very rare in Burmese rubies of ...
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