Discusses the mineralogical composition and provenance of this spotted decorative gemstone.
Read MoreThis article presents the first complete gemmological characterisation of the historic 128.48 ct Brazilian diamond known as the Star of the South.
Read MoreAustralia’s Argyle mine has set records for volume since its establishment in 1983, and is additionally noted for its rare pink diamonds.
Read MoreAmmolite is a form of aragonite that is obtained from vivid iridescent fossilised ammonite shells mined in Alberta, Canada.
Read MoreHaüyne is a rare mineral and an extremely rare gemstone. Recently, the authors studied a large number of faceted haüynes from the Eifel district of Germany.
Read MoreA new transparent, gem-quality green zoisite has been discovered in the Merelani Hills of mineral-rich Tanzania.
Read MoreThe Ponderosa mine is now producing commercial quantities of the gem-quality labradorite feldspar known as sunstone.
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The authors present the mineralogical and gemmological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.
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Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.
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With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.
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