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demantoid garnet - cushion cut, Madagascar
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Everything you ever wanted to know about demantoid garnet. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.

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Identifying Garnets Simplified

Identifying garnets by species is complicated. Learn how to use refractive index, hue, and absorption spectrum readings to simply the separation process.

The Collector’s Guide to the Minerals of New York State: Book Review

The Collector's Guide to the Minerals of New York State is ideal for both experts and hobbyists. Its information, organization, and photos are first rate.

Faceted Gemstones And Light Return Measurements

What factors determine the light return of faceted gemstones? Facet quality, polish, color, and cut style all play roles. Learn more about these variables.

Best Rough Gemstones For Beginning Faceting

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Why Choose a Barion Cut?

Gem faceters must consider factors like brilliance, color, and faceting yield before choosing a cut style. Learn what a Barion cut can bring to a gemstone.

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