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Tiffany Stone (Bertrandite) Slabs

Bertrandite is more commonly called Tiffany Stone. It is an opalite (common opal), and often has a soft rind. Fine quality tiffany stone has purple coloration and can even be a pure dark, translucent purple color.

Tiffany Stone comes from one locality in Utah. The mine is no longer open for collecting and all of this beautiful material is now ground up for beryllium ore. The beryllium content in tiffany stone is locked up in a silicated compound, much like the beryl minerals aquamarine and emerald. Because of the compounded nature of the beryllium in these minerals, it is like any other agate or opalite and not hazardous to cut and polish . However, the dust from pure industrial beryllium, metallic alloys of beryllim or ceramic beryllium is toxic and very dangerous to breathe.

Most opalites can contain some fractures, as does tiffany stone. Some uneven hardness can be encountered in this material, but tiffany stone generally cuts easily and takes a fine polish with diamond, tin or cerium oxide. Mohs hardness is 5 to 6.



Example of Tiffany Stone Cabochons
Note: Not cut from material below.

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Agates    Apache Gold    Aventurine    Calcite/Travertine    Cacoxenite    Charoite    Chrysocolla    Clam Chowder Stone    Copper Secondaries    Coprolite    Crinoid Marble    Dalmatian Stone    Dinosaur Bone    Dolomite    Fossil Stone    Goldstone    Green Cloud    Hypersthene    Indian Paint Rock    Jade    Jaspers    Lapis Lazuli    Lepidolite    Malachite    Maw Sit Sit    Montana Bark    Mookaite    Nunderite    Obsidians    Petrified Wood    Picasso Marble    Pietersite    Pinolith    Quartz    Rhodochrosite    Rhodonite    Rhyolites    Ruby in Fuchsite    Ruby in Zoisite    Seraphinite    Serpentine    Sodalite    Spider Woman    Thulite     Tiffany Stone    Tiger Eye    Tiger Iron    Turquoise    Unakite    Variscite    Youngite   
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