Reports on a CVD-grown synthetic diamond fashioned in the approximate shape of an octahedron.

Offers a classification of radiation stain morphology and texture using photomicrography to supplement known characteristics of naturally irradiated diamonds.

An inclusion feature with a mobile bubble is examined in a spinel reportedly from Myanmar.

The Mumbai laboratory encounters numerous small atypical bead cultured pearls drilled and strung alongside natural pearls.

The gemological community mourns the loss of mineralogy professor George Rossman.

Examines the organic-rich cores of non-bead cultured “keshi” pearls from Pinctada maxima mollusks to distinguish them from natural pearls of the same species despite their similar internal structures.

A light gray near-round pearl exhibits an opening plugged with a drilled seed pearl.

Examination of inclusions in a red spinel reveals signs of heat treatment.

Analyzes a 1688 probate inventory of Gregorio di Girach-Mirman’s extensive gemstone collection to highlight the global reach and influence of Armenian merchants in the early modern luxury trade.

A rare specimen of moldavite tektite with unbroken spires from the Czech Republic is examined.

The life of gemologist George “Pete” Yantzer is remembered.

A rare transparent dark red-brown freeform step-cut staurolite is examined in the Carlsbad laboratory.

An overview of the Spring 2026 Gems & Gemology content.

An exploration of the Cartier and Myths exhibit, examining how Cartier jewelry engages with classical antiquity, mythology, and artistic traditions.

歴史的な宝石学の書籍リスト