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Mineralpedia Details for Walstromite

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Walstromite

Walstromite

Formula
BaCa2Si3O9 
Crystal System
Triclinic 
Crystal Habit
Granular 
Cleavage
Perfect, Perfect, Very Good 
Luster
Vitreous - Pearly 
Color
colorless, white 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
3.5 
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Walstromite from Esquire #7 claim, Big Creek, Fresno Co., California, United States

Walstromite
            from Esquire #7 claim, Big Creek, Fresno Co., California, United States
Special Info
Type Locality

Rich specimen from the type locality out of a handful worldwide localities. Walstromite, named after Robert Walstrom of California, is another barium silicate found in barium rich metamorphic rock. It is fluorescent yellow to orange, which aids in the identification. It is white to colorless with a perfect cleavage.

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Walstromite from Esquire #8 claim, Big Creek, Fresno Co., California, United States

Walstromite
            from Esquire #8 claim, Big Creek, Fresno Co., California, United States
Special Info
Fluorescent

Faint green large plates of Walstromite to 1.5cm which gives a nice orange response to LW and SW UV. Signed label from the man who the mineral is named after, Robert E. Walstrom. Robert mined these specimens and brought them to market. 

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