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Frequently Asked Questions (FAQ) / Calibrated Size Chart

Are there any kinds of gemstones which are always untreated?

Yes, many varieties of gemstones are rarely or never treated. They include spinel, all the different garnet varieties (spessartite, rhodolite, tsavorite, almandine, pyrope, hessonite), tourmaline, peridot, orange and brown zircon, prehnite, fluorite, kyanite and a number of other varieties. About 75% of all the gems in our inventory are completely untreated. Click here to see all our Untreated Gemstones.

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