Article Search Results

Show Filters
Showing 6 results for "������������������������������2���"


Articles (6)

Content Type


XClear Selections
Rough diamonds
De Beers Reduces Rough Prices – Too Little?

De Beers reduces rough prices at May sight, undisclosed treated diamonds submitted to GIA, and Sotheby’s and Christie’s sales break auction records − again.

Read More

Coloured Diamonds in the Aurora Butterfly of Peace Collection
The “Type” Classification System of Diamonds and Its Importance in Gemmology

Knowledge of type allows gemmologists to better evaluate if a diamond might be treated or synthetic, and whether it should be sent to a laboratory for testing.

Read More

Characterisation and Grading of Natural-Colour Yellow Diamonds

A large number of natural-colour yellow diamonds are analysed using grading and appearance aspects among other characteristics to clarify the differences between them and the light yellow diamonds associated with GIA's D-to-Z colour grading scale.

Read More

An Important Exhibition of Seven Rare Gem Diamonds

The stories behind seven strikingly beautiful rare natural diamonds, united in an exhibit at the Smithsonian, are told here.

Read More

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.

Read More

Grading the Hope Diamond

One of the most popular exhibits at the Smithsonian Institution, the stunning Fancy Dark greyish blue Hope diamond was formally graded by GIA’s gem laboratory.

Read More