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.

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.

Examination of an Oregon sunstone sample reveals pyritic and copper inclusions.

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

This document provides the publication information for Gems & Gemology