"Tiffany stone" is a trade name used for a rare purple, blue, orange, and white gem material that can be cut and polished. It is mined at one location worldwide - the Brush Wellman beryllium mine, at Spor Mountain, western Utah. Geologically, Tiffany stone is a rock composed primarily of fluorite with smaller amounts of opal, calcite, dolomite, quartz, chalcedony, bertrandite and other materials.

Freeform cut polished to a satiny luster.  Flat, matte finish back with a beveled edge for ease of setting. You will receive the exact gemstone shown in photos.

Weight: 13.95 carats
Length: 25.64 mm
Width: 18.25 mm
Height: 5.31 mm

Gem Species: Fluorite-Opal
—Variety: —
Phenomenal: no; no play-of-color
Trade Name(s): Tiffany Stone, Opalized Fluorite, Ice Cream Stone, Bertrandite^, Opalite*
Origin: Utah, USA
Enhancement(s): (N) Natural

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^ Using the term “bertrandite” as the name of this material is incorrect. Bertrandite is itself a mineral and only comprises a few percent of the rock known as Tiffany stone.

* Using the term "opalite" to describe natural non-phenomenal (no play-of-color) common opal is deceptive and a punishable crime under US Federal Trade Commission regulations. Opalite is a man-made glass; it is neither synthetic opal nor natural opal.

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American Gem Trade Association Gemstone Enhancement Codes

Enhancement: Any treatment process other than cutting and polishing that improves the appearance (color/clarity/phenomena), durability, or availability of a gemstone.

(N) Natural
No modification; natural stones which are not currently known to be enhanced (or currently has no known modification process).