Winter 2013 - Volume 49, Issue 4
Issue Overview
Show Filters
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.

Read More

Books: Fashion Jewellery: Made In Italy

Chronicles the rise of Italian fashion jewelry from its traditional roots to the visually stunning designs of contemporary artists.

Read More

Titanium-Bearing Synthetic Alexandrite and Chrysoberyl

Overview and commentary on the 2013 Journal of Gemmology article “Titanium-Bearing Synthetic Alexandrite and Chrysoberyl.”

Read More

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.

Read More

Gemological Characteristics of Coated Jadeite Jade

Analyzes the effects of coating on green jadeite specimens using DiamondView imaging, microscopy, spectroscopy, and Raman spectrophotometry.

Read More

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.

Read More

Large Synthetic Moissanite with Silicon Carbide Polytypes

Examination of the properties of a synthetic moissanite specimen submitted as a black diamond.

Read More

Spinel Submitted as Diamond

It is a rare occurrence when a diamond simulant submitted to a GIA laboratory turns out to be a natural gemstone.

Read More

Faceted Wurtzite from Tanzania

The rarity and value of faceted wurtzites from Tanzania are sure to draw the attention of gem collectors.

Read More

Demantoid Garnet Fossil Pseudomorphs

In these two extremely rare specimens, demantoid garnet replaced coral and gastropod fossils.

Read More