Grey-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds coloured grey to blue to violet.
Pink Diamonds from Australia
The author reports on a sudden influx of natural fancy pink diamonds and their origins.
Characterisation and Grading of Natural-Colour Pink Diamonds
Known for their great beauty and rarity, pink diamonds have long been sought after by jewellers, collectors and consumers.
Three Notable Fancy-Colour Diamonds: Purplish Red, Purple-Pink and Reddish Purple
The description and properties of three fancy-colour diamonds auctioned at Christie's.
An Investigation of a Suite of Black Diamond Jewellery
This article reports on the gemmological properties of six large black diamonds set in a suite of jewellery.
Characterising Natural-Colour Type IIB Blue Diamonds
More 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.