Mineralpedia Details for Walstromite

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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
WebMineral: View Walstromite
Mindat: View Walstromite

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

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.