About

Gerald Wykoff

Dr. Gerald Wykoff is GG (Graduate Gemologist), a CSM (Certified Supreme Master gemcutter), educator, and author of several gemology books. He founded the American Society of Gemcutters in the 1980s and served for more than 10 years as the editor of its monthly magazine, American Gemcutter.

Articles by


Gerald Wykoff

Alternative Birthstones

Not happy with your birthstone? Explore these alternative birthstones associated with astrological signs, angels, the hour or day of your birth,…

Mechanical Gemstone Cleaning

Mechanical gemstone cleaning has benefits and risks. Learn all about ultrasonic, steam, and boiling systems and how gems might react to them.…

Gemstone Care Guide

Our gemstone care guide covers many popular gems. Learn how best to maintain your gemstone jewelry and what kinds of stresses and cleaning methods…

Jewelry Silver Content

For jewelry use, silver is often mixed with other metals. Learn how silver content varies between alloys and how to test an item’s silver purity.…

Gem Cutting FAQ

Our gem cutting FAQ covers some common questions from novice faceters. Topics include how to get started, how to clean gemstones, and dopping issues.…

The History of Lapidary

A full and complete history of the lapidary arts, from 70,000 BC to present day. The origins of faceting, bruting, and carving.

How to Facet Gems

What does it take to facet gems? Patience and HAI, locking the gem at the right height, angle, and index on a faceting machine. Learn how you can do…