Provides an overview of processes for synthesizing gem materials and explains how unique growth conditions enable them to be separated from naturally formed gems.

A large baroque-shaped blister pearl with a unique multicolored appearance is examined in the Mumbai laboratory.

An intriguing inclusion scene is analyzed in a Paraíba tourmaline from Brazil.

A transparent feather observed in a natural diamond resembles a conch shell.

An unheated purplish red ruby cabochon displays a white double-star phenomenon.

Several lots sold during the spring auction season far exceeded their presale estimates.

An in-depth look at Clarity Diamond’s CVD facility in Austin, Texas.

This document provides the publication information for Gems & Gemology