The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds coloured grey to blue to violet.
Read MoreThe author reports on a sudden influx of natural fancy pink diamonds and their origins.
Read MoreKnown for their great beauty and rarity, pink diamonds have long been sought after by jewellers, collectors and consumers.
Read MoreThe description and properties of three fancy-colour diamonds auctioned at Christie's.
Read MoreThis article reports on the gemmological properties of six large black diamonds set in a suite of jewellery.
Read MoreMore than 400 blue diamonds were studied at the GIA Gem Trade Laboratory over several years to reveal additional information about the relationships between their colour, clarity and other gemmological properties.
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