The mineral or gemstone chrysoberyl is an aluminate of beryllium with the formula BeAl2O4. The name chrysoberyl is derived from the Greek words χρυσός chrysos and βήρυλλος beryllos, meaning "a gold-white spar".
Ordinary chrysoberyl is yellowish-green and transparent to translucent. When the mineral exhibits good pale green to yellow color and is transparent, then it is used as a gemstone. The three main varieties of chrysoberyl are: ordinary yellow-to-green chrysoberyl, cat's eye or cymophane, and alexandrite. Yellow-green chrysoberyl was referred to as "chrysolite" during the Victorian and Edwardian eras, which caused confusion since that name has also been used for the mineral olivine ("peridot" as a gemstone); that name is no longer used in the gemological nomenclature.
Stone type: Natural Topaz, Shape: Oval, Color: White, Weight carat: 6.95, Treatment: Untreated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 10.00x8.00, Sale information: Lot price, Lot details: Pair for earrings
Stone type: Natural Smoky Quartz, Shape: Baguette, Color: Dark brown, Weight carat: 2.90, Treatment: Heated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 10.00x7.90, Sale information: Price by piece
Stone type: Natural Topaz, Shape: Round, Color: White, Weight carat: 0.03, Treatment: Untreated, Additional details: Hi quality stone, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 1.40, Sale information: Price by piece, Lot details: Similar color of stones
Stone type: Natural Smoky Quartz, Shape: Baguette, Color: Dark brown, Weight carat: 2.80, Treatment: Heated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 12.80x6.40, Sale information: Price by piece
Stone type: Natural Smoky Quartz, Shape: Emerald, Color: Dark brown, Weight carat: 11.35, Treatment: Heated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 16.20x12.10, Sale information: Price by piece