Article Search Results

Show Filters
Showing 43 results for "chameleon diamonds"
Article
Famous Diamonds Examined by GIA

An aura of mystery has always surrounded these natural wonders, so it was quite an honour when GIA researchers examined these famous diamonds.

Read More

Harry Winston: A Story Told in Diamonds

An overview of some of the most fabulous and famous diamonds that Harry Winston has known.

Read More

The GIA Museum’s “Dreams of Diamonds” exhibit featured more than 4,000 carats of diamonds, and marked the U.S. debut of Alastair Laidlaw and Christine Marsden’s like-named book – a 160-page, 33-lb. tome. Photo by Kevin Schumacher/GIA
Article
‘Dreams of Diamonds’ Book and Exhibition Celebrate Spectacular Gems

Explore the wondrous world of diamonds in this large book (2 stone 5 lbs and three feet wide when open) and gallery from a past exhibition – that reveals their detail and beauty.

Read More

Six different shaped red and pink diamonds lined up in a row.
Article
Bank Suspends Credit for ‘Unprofitable’ Rough Diamonds

De Beers and Alrosa slashed rough diamond sales after ABN AMRO’s says it will no longer finance rough purchases for goods that can’t be cut profitably.

Read More

Sally Agarwal’s bracelet features 87 polki cut diamonds.
Article
Polki Diamonds: A ‘New’ Fashion Statement from Mogul India

Old becomes new when polki diamond, one of the oldest forms of cut diamond, finds new life in Western jewellery designers’ pieces.

Read More

Fingerprinting of Two Diamonds Cut from the Same Rough

With the information from a combination of tools now available, the sophisticated gemmologist can fingerprint a given stone.

Read More

People meet and mingle at the entrance to the JCK Show.
Article
Headwinds Slow 2019 Vegas Business, Lab-grown Diamonds Proliferate

Decent demand for finished jewellery, but less for loose gems. Plus: Lab-grown diamonds and responsible, sustainable business practices.

Read More

The Cullinan Diamond Centennial: A History and Gemmological Analysis Of Cullinans I And II

Eight decades after the Cullinan diamond was mined, a team of gemmologists examined the two famous gems that were created from it to become part of the Crown Jewels of England.

Read More

A pile of rough diamonds.
Article
US Government to Industry: Know Your Supply Chain; De Beers and Alrosa Cut Rough Sales

De Beers and Alrosa slashed rough diamond sales after ABN AMRO’s says it will no longer finance rough purchases for goods that can’t be cut profitably.

Read More

Terri Ottaway stands behind a table with several very large quartz crystal specimens are lined up on it. Some of them come up to her waist height.
Article
GIA’s Museum Team Creates Magic for New York Campus

Display features award-winning diamonds, huge quartz rock crystals, unusual carved gems and pieces of jewellery that represent multiple eras of design.

Read More