Locality: North Mesa mine group (west ½, southwest ¼ of section 35, Township 224 South, Range 11 East), Temple Mountain mining district, Emery County, Utah, USA.

Occurrence: In a silicified tree approximately 46 cm wide by 30 cm high surrounded by a rim of coal 6 to 25 mm thick. Associated minerals are: orthominasragrite and bobjonesite.

General appearance: Crusts and spherical granular aggregates (<1 mm across) of irregular grains (<0.1 mm).

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: not stated, but probably transparent. Color: pale blue. Streak: white. Luminescence: nonfluorescent....

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