Presents the gemmological and spectroscopic properties of a suite of synthetic diamonds grown by AOTC using high pressure and high temperature.
Read MoreDocuments a series of visits to Myanmar in search of exceptionally bright pinkish red spinels possessing no dark tones.
Read MoreA peridot-like bright greenish yellow to green gem material called “green amber” has recently appeared in the gem market.
Read MoreThere have been a number of changes in Ammolite production from southern Alberta, Canada, since 2001.
Read MoreA study of the nacre and the cavity of a large Pinctada maxima cultured pearl yields a theory on the specimen’s formation.
Read MoreLiddicoatite, a calcium-rich lithium tourmaline, was recognised as a separate mineral species in 1977, and named in honour of Richard T. Liddicoat.
Read MoreHigh-quality synthetic diamonds created by the Gemesis Corp. are examined and their gemmological properties are explicated.
Read MoreThis article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.
Read MoreInclusions of native copper and tenorite (CuO) were found in greyish-green elbaite from São José da Batalha, Paraíba, Brazil.
Read MoreDe Beers has produced a faceted synthetic gem-quality diamond that could go unrecognised without careful gemmological testing.
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