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Denver Gem & Mineral Showcase 2017

With over 900 vendors and numerous geologic rarities, the 2017 Denver Gem & Mineral Showcase had plenty to see. Read about some highlights in our report!

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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.

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.

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Aquamarine Buying Guide

No gem evokes the blue-green colors of the sea like aquamarine. Our aquamarine buying guide can help you choose the best gemstone for your jewelry project.

morganite buying guide - cushion-cut morganite ring
Morganite Buying Guide

Morganite has become a popular jewelry stone, especially for engagement rings. Our morganite buying guide can help you pick a great gem for any occasion.

old mine emerald in a modern ring - emerald buying guide
Emerald Buying Guide

Our emerald buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.

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Understanding Gemological Formulas

Gemological formulas identify the chemical composition of gems and minerals. Learn what the symbols, numbers, and parentheses mean.

trapiche emerald - Somewhere in the Rainbow Collection
What is a Trapiche Emerald?

Trapiche emerald gems are some of the world's rarest emeralds. Learn where they're found and how their characteristic “spoked wheel” patterns are formed.