Article Search Results

Show Filters
Showing 30 results for "*"
Rough CLIPPIR diamonds
The Very Deep Origin of the World’s Biggest Diamonds

Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular, and Resorbed), that formed in a superdeep environment.

Read More

Cross-like cloud pattern in diamond.
Unusual Cloud in Diamond

A diamond with a previously unseen clarity characteristic is seen in GIA’s Carlsbad lab.

Read More

Article
The Unexpected Origins of Big Diamonds

Dr. Evan Smith, Ph.D., GIA research scientist, has dedicated his work to methodically characterizing the inclusions found in rare diamonds. In this video presentation recorded at the 2017 JCK Las Vegas show, Smith shares his findings on the unexpected ori

Read More

Article
Fall 2015 G&G: Trapiche Emeralds, Synthetic Diamonds and a Large Diamond Source

G&G Brief presents an overview of the content of the Fall 2015 issue of Gems & Gemology.

Read More

Multi-colored gems are superimposed on an image of glacier peaks.
Article
Gems and Minerals from the Subarctic

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

Read More

Three pieces of labradorite with yellow, blue and green flashes of color.
Article
Optical Effects of Phenomenal Cabochons

Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.

Read More

Fall 2016 Gems & Gemology Cover
Article
Fall 2016 G&G: CVD Synthetic Diamonds Survey, Reversible Color Change in Blue Zircon

A summary of the content found in the Fall 2016 issue of Gems & Gemology.

Read More

Evan Smith studies images of diamond inclusions on a computer.
Article
Postdoctoral Program Gives Scientists Access to Rare Research Opportunities

GIA’s postdoctoral program gives researchers access to gemological data, equipment and rare, unusual and large gems in its laboratories.

Read More

Fancy pink brown diamond
Diamond Inclusion with Radiation Halo

A diamond’s inclusion, with a radiation stain shaped like a halo, is found to be monazite.

Read More

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.

Read More