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Raley Design Studios

Psilomelane Cabochon, 6.45 cts.

Psilomelane Cabochon, 6.45 cts.

Regular price $18.00 USD
Regular price Sale price $18.00 USD
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This material typically exhibits swirls and alternating layers of black Romanèchite and gray Pyrolusite, both of which are a manganese oxide and can achieve a submetallic luster (almost mirror finish).  Flat, semi-polished back with a beveled edge for ease of setting.  You will receive the exact gemstone shown in photos.

Weight: 6.45 carats
Length: 16.05 mm
Width: 10.18 mm
Height: 3.49 mm

Group: Hydrous Manganese Oxide
-Species: Romanèchite-Pyrolusite
--Variety: -
Trade Name(s): Psilomelane, Black Hematite*
Origin: Australia
Enhancement(s): (N) Natural

* Using the term "black hematite" to describe this material is deceptive and a punishable crime under US Federal Trade Commission regulations!  Hematite is an Iron oxide with a different chemical makeup. 

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).


Items ship within 1-2 business days Monday through Friday, excluding U.S. holidays.

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