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gemstone luminescence
What is Gemstone Luminescence?

Gemstone luminescence is a glow that occurs when certain stones are subjected to energy such as UV light. This effect can help gemologists identify gems.

rosaline pearl necklace - opal and pearl care guide
Opal and Pearl Care Guide

Opals and pearls have special setting, cleaning, and storage needs. Our opal and pearl care guide will help you keep your jewelry beautiful.

Ethiopian opal, faceted by Mark Kaufman - opal gems
Opal Value, Price, and Jewelry Information

Everything you ever wanted to know about opal gems. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.

marquis cut diamond ring - how to choose a diamond
Choosing, Rating, and Grading Diamonds

First-time gem buyers may not understand how choosing, rating, and grading diamonds work. Our consumer guide both explains and offers advice on all three.

pink topaz engagement ring
Colorful Options: Choosing Topaz Engagement Ring Stones

You can probably find a topaz engagement ring stone in your favorite color at a reasonable price. Learn what to look for and how to care for your gem.

amethyst brooch
Amethyst Value, Price, and Jewelry Information

Everything you ever wanted to know about amethyst. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.

Crater of Diamonds State Park, AR - gem hunting in the US
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.

Gram Easy Emerald - tourmaline
Gram Easy Emerald: Online Faceting Designs & Diagrams

The Gram Easy Emerald by Jeff Graham is easy to cut and will maximize gem yield. This design will also fit stones with arbitrary length to width ratios.

jadeite, diamond, and white gold ring
Jadeite Value, Price, and Jewelry Information

Everything you ever wanted to know about jadeite. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.

malaya garnet buying guide - 4.15ct mahenge surrounded by rough
Malaya Garnet Buying Guide

Rare malaya garnets come in many colors and make wonderful jewelry stones for any style. Learn the 4Cs of this gem in our malaya garnet buying guide.

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