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What is a Princess Cut Diamond?

What constitutes a princess cut? Jeff Graham examines a variety of diamonds sold as examples of this design and identifies their overall characteristics.

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Fancy Colored Yellow Diamond Buying Guide

Fancy colored yellow diamonds are becoming increasingly popular. Our yellow diamond buying guide has the information you need before your next purchase.

quartz with inclusions - mechanical gemstone cleaning
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.

diamond myths - yellow gold and diamonds
Are Diamonds Really Rare? Diamond Myths and Misconceptions

Diamonds are popular gemstones surrounded by popular misconceptions. We'll tell you how they became so prized and debunk some of those diamond myths, too.

Colorado gemstones - rhodochrosite pendant
A Visitor’s Guide to Colorado Gemstones

Colorado has a lot to offer gemologists and rock hunters. Before you visit, learn about Colorado gemstones as well as notable gem shows, museums, and clubs.

solitary ring and round diamond - diamond symmetry
How To Evaluate Diamond Symmetry

How can you evaluate diamond symmetry without an expensive proportion scope? Learn how to build an inexpensive alternative tool that will get the job done.

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Should I Buy a Diamond Online?

Do you want to buy a diamond for an engagement ring? Don't. Still want to buy a diamond? OK. Here are the top three reasons not to buy a diamond online.

gemstone luster - talc various
What Is Gemstone Luster?

Gemstone luster describes how a gem's surface looks when it reflects light. Learn the common terms gemologists use for this property and what can affect it.

diamond pendant - diamond quality grading guidelines
FTC Guidelines for Grading Diamond Quality

The FTC requires jewelers to accurately represent the diamond quality grading systems they use. Learn the guidelines and protect yourself from liability.

diamond simulants - moissanite ring
Properties of Diamond Simulants

Diamond simulants, materials that look like real diamonds, often appear in jewelry. See how the properties of real diamonds compare with popular imitations.

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