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Venetian mask cloud inclusion
Article
Diamonds Under the Scope

Peer through a microscope and discover another world of gems. Inclusions reveal the gem’s journey from deep within the earth to its surface.

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Article
GIA's Gübelin Gem Project: Various Gems, Danburite – Humite

Among the collection assembled by Dr Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Man stands at a podium in front of a room of people.
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What Country Do My Diamonds and Other Gemstones Come From?

Dr James Shigley shares how GIA determines coloured stone origin and the mysteries of diamond origin.

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A large yellow cushion cut diamond pendant is partially framed with marquis cut diamonds and hangs from a necklace of mixed cut diamonds.
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Yellow Gemstones: Can You Identify Them?

Don’t judge a yellow gem by its colour alone. A variety of gemstones also come in shades of yellow, from diamonds to citrine to garnets.

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Diamond History and Lore

The world’s love of diamonds began in India, where diamonds were gathered from the country’s rivers and streams. Some historians estimate that India was trading in diamonds as early as the fourth century BC.

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Diamond
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Diamond Quality Factors

Learn about the factors that make diamonds so desirable.

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Diamond
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Diamond Description

Diamond is the only gem made of a single element: It is typically about 99.95 per cent carbon. The other 0.05 per cent can include one or more trace elements, which are atoms that aren’t part of the diamond’s essential chemistry. Some trace elements can influence its colour or crystal shape.

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Article
Diamond Journey

Diamonds are among nature’s most precious and beautiful creations

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Three round brilliant diamonds in a row
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GIA Researchers Evaluate ‘Light Performance’ and Diamond Cut

The phrase “light performance” gets a lot of loose use in the diamond trade, but what does it mean when someone is actually looking at a diamond?

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Three men at a conference table.
Article
A Look Back — and Forward — After 40 Years in the Gem and Jewellery Industry

Russell Shor reflects on the people, gems and stories he’s encountered as he’s covered the industry over the years.

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