Tourmaline Value, Price, and Jewelry Information

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How Do Tourmalines Form?

Tourmalines are a large mineral group with a variety of chemical compositions. Learn how tourmalines form and why so many colors can appear in one…

Top Spots for Gem Hunting in the US

Visit one of the top gem hunting spots in the US. Go alone or with the family. A gemology-themed vacation can be fun, educational, and (maybe) profitable.…

Trapiche Gems: An Introduction

Satisfying the human desire for symmetry, trapiche gems have a special allure. Learn what makes these rarities so unique in our introductory article.…

What is Gemstone Pleochroism?

Some gems show pleochroism, two or three different colors depending on the viewing angle. Learn why this occurs and how it helps gemologists identify…

Tourmaline Buying Guide

Known for stunning, saturated hues, tourmaline is a colorful and modern gemstone. Read about quality factors for this gem in our tourmaline buying…

A View of the Quartzsite Gem Shows

The Quartzsite gem shows attract gemologists and rock hounds from around the world. Learn what to expect and how to shop at these huge annual January…

Chrome Tourmaline Buying Guide

Rare chrome tourmaline can show an emerald-like green color. With a highly desired color and tourmaline’s excellent qualities as a jewelry stone,…

Rubellite Tourmaline Buying Guide

Like all tourmaline gemstones, rubellite wears well in almost any type of jewelry. This stone’s raspberry-like color draws a great deal of attention.…

Gemstone Examination Lesson

Learning how to conduct a gemstone examination takes practice. Follow an expert gemologist step-by-step through tests of five unknown samples.…

Gemstone Orientation for Beginners

Choosing the best gemstone orientation for your rough takes skill and experience. Learn what factors you should take into account before cutting.…

Rubellite Faceting Information

Helpful information on how to cut and polish Rubellite Tourmaline stones. Essential guides, tips and details necessary for Rubellite Tourmaline…

Hiddenite Faceting Information

Essential Tips and suggestions about Hiddenite Tourmaline Faceting. Helpful information, details and guides on how to Facet Hiddenite Tourmaline…

Siberite Tourmaline Material

Jeff R Graham shares his opinions and thoughts on various topics in Just Ask Jeff. See what his answers are to What does Siberite Tourmaline look…

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