What’s the Difference Between Mineral Samples and Gem Rough?
For faceting, the distinction between gems and minerals is usually clarity. However, learn why the decision to cut may be an aesthetic or even a moral one.
Answer: As far as faceting goes, the most important distinction between gems and minerals is clarity. Most crystals aren't clean. That immediately reduces their value as facet rough.
If you find a crystal with a large clean area, then you get into aesthetics.
Should You Cut It?
Whole crystals are much rarer than broken pieces. If the crystal (or crystals in a cluster) are in good condition, and especially if it has some of the original matrix attached, then you've found a rare prize. It would be a shame (maybe even immoral) to cut specimens of this quality, as there are so few. Great finds like these are worth more whole.
You'll rarely encounter this situation. Few mineral specimens actually have the clarity needed for faceting. However, gems and minerals don't have to be cut to be appreciated for their beauty.
Donald Clark, CSM IMG
International Gem Society
Related Articles
The Path to Success in the Gem Trade
A Cabochon Bezel Setting For Unusual Opal Doublets
How Does Vapor Deposition Create Mystic Topaz and Aqua Aura Quartz?
Facet Designs For Beginners
Latest Articles
Quartz Toxicity: Understanding the Risks for Jewelers and Wearers
Synthetic Amethyst: What is it and How is it Made?
Hambergite Value, Price, and Jewelry Information
Pearl Simulants: How to Spot Faux Pearls
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!