See Gem As
Tools
Research
Fall 2001 Gem News International
Spring 1988 G&G; Lab Notes
The Largest Diamond Ever Discovered in North America
GIA examines a 552.7 ct diamond from the Diavik mine in Canada.
Fall 2011 G&G; Lab Notes
This section, from the Fall 2011 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
Very Large Rough Diamond
A Melee-Sized CVD Synthetic Diamond in Pearl and Diamond Jewelry
GIA's Gübelin Gem Project: Various Gems, Danburite – Humite
Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.
Diamond Polish and Symmetry: Guide to GIA Terminology and Abbreviations
Every GIA diamond grading report contains an assessment of a diamond’s polish and symmetry, which are contributing factors in determining the overall quality of a diamond’s finish. This guide explains each polish and symmetry feature, along with their abbreviations and the possible locations of polish features on the diamond.
