Article Search Results

Show Filters
Showing 18 results for "*"
Diamond with concentric octahedral growth layers.
Diamond with Concentric Inclusions

A fancy-color diamond shows inclusions that outline growth layers.

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

Diamond with Coesite Inclusions
Coesite Inclusions with Filaments in Diamond

Inclusions with unusual formation are found in a treated Fancy Vivid yellow diamond.

Read More

Iridescent colors of the ferropericlase inclusion.
Ferropericlase Inclusion in Diamond

An iridescent inclusion may reveal a diamond’s subsurface origin.

Read More

Hydrogen-rich Diamonds
Gray-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 colored gray to blue to violet.

Read More

Digital Photomicrography for Gemologists

A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.

Read More

Article
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

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

Read More

Characterizing Natural-Color 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 color, clarity, and other gemological properties.

Read More

Yellow Diamond
Xenotime Inclusion in Yellow Diamond

Presents what is believed to be the first report of a xenotime inclusion in gem-quality diamond.

Read More

Fish-Like Inclusion Found in Fancy Yellow "Cape" Diamond

A recent lab examination at GIA New York revealed an inclusion in a rectangular Fancy Yellow called "pareidolia," which means it was a resemblance of the scales and form of a fish.

Read More