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Mineralpedia Details for Rosenhahnite

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Rosenhahnite

Rosenhahnite

Leo Rosenhahn, an amateur mineralogist from California, USA who discovered the mineral, is the namesake for Rosenhahnite. At its type locality in Russian River in California, USA, Rosenhahnite occurs in veins within brecciated, garnet- and diopside-bearing metamorphosed sediments. Rosenhahnite can be found at additional localities including Japan, New Zealand, and Russia. It will fluoresce a light orange-pink under long-wave ultraviolet light.

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

Formula
Ca3Si3O8(OH)2 
Crystal System
Triclinic 
Crystal Habit
Tabular 
Cleavage
Perfect, Good, Good 
Luster
Vitreous (Glassy) 
Color
beige white, colorless 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
4.5-5 
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Rosenhahnite from Russian River, Mendocino Co., California, United States

Rosenhahnite
            from Russian River, Mendocino Co., California, United States
Special Info
Fluorescent, Type Locality

Here's a specimen with a little history behind it. Basically read the accompanied label as it is from Leo Rosenhahn himself - the guy they named the mineral after. And to further this, the specimen was analyzed by Adolf Pabst. I like what the label says about the mineral never being found in place. It was found as float. May not be true now. It is slightly fluorescent orange.

Click thumbnail images for larger view.

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