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Mineralpedia Details for Jennite

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Jennite

Jennite

Named to honor Colonel Clarence M. Jenni who was Director of the geological Museum at the University of Missouri at Rollo, USA and was the discoverer of the mineral. Jennite is a rare late stage mineral that occurs partially filling open spaces and veins in fractured skarns. It can be found in the United States, Italy, Germany, Israel, South Africa, and Japan.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/jennite.pdf

Formula
Ca9Si6O16(OH)10ยท6H2
Crystal System
Triclinic 
Crystal Habit
Bladed, Platy 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
white 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
3.5 
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Jennite from Commercial quarry, Crestmore, Riverside Co., California, United States

Jennite
            from Commercial quarry, Crestmore, Riverside Co., California, United States

Small, less than 1cm, specimen with white, matted, fibrous crystals to 1-2mm.

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