Research Article Search Results
Searching for Emeralds in Afghanistan
GIA field gemologists are a different breed. When Andy Lucas, GIA manager of Field Gemology in Carlsbad, decided to take some vacation time, he didn’t make for the usual destinations. No beaches, ski resorts, or cosmopolitan cities. Lucas instead headed off to Afghanistan, lured by deposits of fine emeralds.
Landmark Articles from Gems & Gemology
For eight decades, Gems & Gemology, GIA’s peer-reviewed quarterly journal, has educated generations of readers and protected the gem-buying public. We share ten landmark articles that were particularly significant to gem and jewelry professionals.
Mogok Series, Part 2: The Expedition, the Mines, and the People
An expedition to Mogok, Myanmar, documenting the current state of their ruby mining, markets, and cutting industries. This exotic land, known as the "Valley of Rubies," is one of the world’s most famous gemstone sources.
Mogok Expedition Series, Part 1: The Valley of Rubies
An expedition to the Mogok area of Myanmar documenting the current state of their ruby mining, markets, and cutting industries. This exotic land, known as the "Valley of Rubies," is one of the world’s most famous gemstone sources.
Recent Advances in Understanding the Geology of Diamonds
Examines the last two decades’ advances in analyzing and understanding the formation of natural diamonds, and their relation to the earth’s formation.
“Gran Dama” Brooch Featuring Large Melo Pearl
The centerpiece of this brooch is a 98.67 ct Melo pearl, believed to be one of the world's largest.
Update on Gemstone Mining in Luc Yen, Vietnam
Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline, and other colored stones.
Blue Sapphires from the Baw Mar Mine in Mogok
Reports on the microscopic, chemical, and spectroscopic features that differentiate the high-quality Baw Mar sapphire from “classic” gem-quality Burmese sapphire.
Describing 58-facet Round Brilliant-Cut Diamonds at GIA
Many beautiful older diamonds are cut to different proportions than modern round brilliants, which makes them a challenge to grade according to modern cut conventions. This article describes how the GIA accommodates these historic gems.
Video Feature: Emerald Sources of Brazil
Video compilation explores Brazil’s most important emerald deposits, as well as the country’s mining practices and laws.
Agates from Morocco: Gemological Characteristics and Proposed Origin
A report on the chemical and mineralogical analysis of samples’ solid inclusions.
Book Review: From a Snowflake to an Iceberg: The McFerrin Collection
By Dorothy McFerrin, publ. by the McFerrin Foundation, College Station, Texas, 2013, US $125
