The best natural quartz crystal is the Uruguayan amethyst, which comes with Geode crystals.
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Amethyst Quality Grading & Sources - Moriartys Gem Art
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Which Is the Best Cut for Amethyst?
I have this large amethyst geode but it's dusty. What is the best way to clean this and preserve the crystals inside?? Thanks in advance! : r/geology
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How Amethyst Became One of the Best Kept Royal Secrets - Michael's Gems & Glass
A Buyer's Guide to Amethyst Qualities: Natural AAA vs AA vs A
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A Buyer's Guide to Amethyst Qualities: Natural AAA vs AA vs A
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Amethyst - Facts about the Amethyst Gemstone | GemstoneGuru
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Amethyst #G-2106
Explore the Amethyst Meaning: Discover Its Healing Properties & Uses | HowStuffWorks
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Best Quality & Most Valuable Amethyst Types | Village Rock Shop
