Examines correlations between surface microstructures and the orange peel effect in Russian white nephrite, proposing a formation model and revealing distinctive microfeatures specific to the material.

A diamond feather and its reflection resemble an unidentified flying object.

Examination of a 1.34 ct ruby reveals a unique inclusion formed during heat treatment.

A diamond octahedron from South Africa hosts a rare yellow-orange almandine-pyrope garnet crystal.

A euhedral prismatic pargasite crystal is identified in pink spinel.

Play-of-color pattern in Ethiopian opal is reminiscent of a turtle’s shell.

A non-nacreous pearl with a netted surface resembles the exterior of a melon.

11 月初，在加州卡尔斯巴德总部举行的 GIA 理事会会议上，研究院授予 Susan M. Jacques最高荣誉 — Richard T. Liddicoat杰出成就奖。

11 月初，在加州卡尔斯巴德总部举行的 GIA 理事会会议上，研究院授予 Susan M. Jacques最高荣誉 — Richard T. Liddicoat杰出成就奖。

A 37.41 ct natural rough diamond with distinct pink and colorless zones is examined at GIA’s Botswana laboratory.

The board of directors of GIA India Laboratory Pvt. Ltd. (GIA India) has appointed Amit Pratihari as managing director, responsible for all aspects of GIA India’s gemological laboratories in Mumbai and Surat, as well as the GIA India school in Mumbai.

The board of directors of GIA India Laboratory Pvt. Ltd. (GIA India) has appointed Amit Pratihari as managing director, responsible for all aspects of GIA India’s gemological laboratories in Mumbai and Surat, as well as the GIA India school in Mumbai.

An overview of the Summer 2025 Gems & Gemology content.