The 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.
Product name: Natural Tourmaline, Shape: Oval, Color: Brown, Stone size: 5.90x5.40 mm, Weight: 0.90 carats, Stone clarity: No visible inclusions, Treatment: Untreated, Origin: Sri Lanka
Stone type: Natural Smoky Quartz, Shape: Baguette, Color: Dark brown, Weight carat: 18.65, Treatment: Heated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 25.50x10.00, Sale information: Price by piece
Product name: Natural Zircon, Shape: Oval, Color: Brown, Stone size: 8.00x5.90 mm, Weight: 2.15 carats, Stone clarity: No visible inclusions, Treatment: Untreated, Origin: Sri Lanka
Product name: Natural Zircon, Shape: Oval, Color: Dark Brown, Size: 6.40x5.00 mm, Weight: 1.05 carat, Stone clarity: No visible inclusions, Treatment: Untreated, Origin: Sri Lanka
Stone type: Natural Smoky Quartz, Shape: Marquise, Color: Dark brown, Weight carat: 1.45, Treatment: Heated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 12.10x5.80, Sale information: Price by piece
Stone type: Natural Topaz, Shape: Emerald, Color: White Brown, Weight carat: 4.35, Treatment: Untreated, Source: Pakistan, Stone Clarity: Slightly visible inclusions, Stone size mm: 10.51x7.47, Sale information: Price by piece