Examines the history of diamond production in Botswana and the long-term outlook for beneficiation through value-added industries.
Read MoreThis article discusses the history and ongoing development of GIA's colour grading system, and explains how its laboratory applies it.
Read MoreModern gemmologists and diamantaires are faced with a broad spectrum of colour and clarity treatments ranging from the simple to the highly sophisticated.
Read MoreHistorically, global rough diamond production has fluctuated greatly due to a myriad of causes, many of which are explored in this article.
Read MoreEight decades after the Cullinan diamond was mined, a team of gemmologists examined the two famous gems that were created from it to become part of the Crown Jewels of England.
Read MoreIn the last decade, progress in diamond growth by chemical vapour deposition (CVD) has resulted in significant improvement in the quality of synthetic single crystals.
Read MoreChameleon diamonds are among the rarest of gem diamonds.
Read MoreA new chart, supplementing the one published in the Winter 1995 issue of Gems & Gemmology, summarises the features of both as-grown (“non-modified”) and treated (“modified”) synthetic diamonds currently in the gem market.
Read MoreThe GIA diamond cut grading system described here includes the components of brightness, fire, scintillation, polish and symmetry, as well as weight and durability concerns, into a single overall grade for cut quality for standard round brilliants.
Read MoreThis article presents information about the CVD process, the history of its development, and properties that differentiate the resulting synthetic crystals from natural diamond.
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