|(Image found on Orissa Gems Exporters)|
Friday, April 20, 2012
Gemstone of the Week: Chrysoberyl
Chrysoberyl is a gorgeous green to yellow gemstone. In general, Chrosyberyl crystals are not uncommon, however, Alexandrite (discussed in an earlier blog post) is a form of Chrysoberyl and is considered one of the rarest and most expensive gemstones available. Chrysoberyl is composed of beryllium aluminum oxide and is a hard and durable stone (hardness 8.5 on the Mohs scale). Often this stone is found granite or granite pegmatites although Alexandrite variety is found in mica schists. Chrysoberyl is found in many countries including: Russia, Myanmar, Zimbabwe, Tanzania, Madagascar, Brazil, Sri Lanka, and a few locations in the U.S.. Chrysoberyl can also occur as a Cat's-eyed variety. Cat's-eye Chrysoberyl ranges from $100 to $3,000 per carat depending on the size and quality. Although other stones may have a cat's-eye variety, when the term "Cat's-eye" is used on its own without another mineral following or preceding it, then it is refering to the Cat'seye Chrysoberyl. Regular Chrysoberyl ranges from $100 to $500 per carat depending on the size and quality of the stone.