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GIA's Gübelin Gem Project: Corundum

Ruby and sapphire (usually blue, but also in every other colour) have been the most important coloured gemstones for several thousand years. Originating historically in south-east and central Asia, and more recently in eastern Africa, these coloured varieties of the mineral corundum have been much sought as gems because of their rarity, colour and durability. Gem corundum can display asterism and chatoyancy due to the presence of oriented mineral inclusions, and in some cases, a change of colour when viewed under different light sources.

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Morganite Quality Factors

Learn about the factors that make morganite so desirable.

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Morganite History and Lore

Following the discovery of a new locality for rose beryl in Madagascar in 1910, George Kunz proposed the name morganite at a meeting of the New York Academy of Sciences on 5 December 1910 to honour his friend and customer J.P. Morgan.

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Morganite Description

Like many gems found in pegmatites, morganite can form large crystals.

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2016 GJX show at Tucson
Tucson 2016

An overview of the 2016 gem shows.

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Article
GIA Gem Project
Beryl

Chemically pure beryl is colourless, but trace elements give rise to green, blue and pink/red colours.

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Summer 2012 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.

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G-Colour CVD Synthetic Diamond
CVD Synthetic Diamond with Unusual DiamondView Image

Deep blue fluorescence in a CVD synthetic diamond mimics patterns found in natural specimens.

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Summer 1996 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.

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Stellate zircon inclusions in vivid purple-pink morganite

Zircon clusters and other inclusions help to create an unusual vivid purple-pink morganite specimen.

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