Thin-film inclusions and triangle-shaped fissures are discovered in the fibrous arms of trapiche-like sapphire samples.

A laurentthomasite rough sample from Madagascar displays an abundance of hexagonal etch features.

A diamond shaped like a cricket bat is submitted to GIA’s Mumbai laboratory.

A report on the identification of three large baroque pearls submitted to the Mumbai laboratory.

A colorless semitransparent thomsonite is examined in the Carlsbad laboratory.

The Carlsbad laboratory reports on a strand of 78 light bluish gray pearls submitted for identification.

Sail-shaped etch features provide proof that a sample sold as aquamarine is actually a spodumene crystal.

Overview and commentary on the June 2013 Rock & Gem article, “Ammolite: An Organic Jewel.”

Juliet Weir-de La Rochefoucauld's book presents a selection of international contemporary jewelry designers.

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

This black diamond's color was produced by natural radiation stains, an unusual cause of color.

Silicon, normally associated with CVD synthetic diamond, may be found in natural diamond.

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

A review of Diamonds: An Early History of the King of Gems by Jack Ogden.

Review of Farah Khan: A Bejeweled Life by Paola De Luca.

Review of Figures & Faces: The Art of Jewelry by Patrick Mauriès and Évelyne Possémé

Review of Geology: A Very Short Introduction by Jan Zalasiewicz.

Review of Jewelry for Gentlemen

Review of Masterpieces in Miniature: Engraved Gems from Prehistory to the Present by John Boardman and Claudia Wagner.