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Macdonaldite with Pellyite

#42238

Macdonaldite with Pellyite

#42238
Availability
Sold
Size
2 x 2 x 2.5 cm - Thumbnail 
Formula
BaCa4Si16O36(OH)2·10H2O (RRUFF)
Locality
Esquire #8 claim, Big Creek, Fresno Co., California, United States

Brown veins of Pellyite with white acicular and silky groups of Macdonaldite. Macdonaldite is a rather rare barium silicate found only in Italy and California. This being the Type Locality. This can be considered a good specimen. 

Type Locality

Macdonaldite

Formula
BaCa4Si16O36(OH)2·10H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Perfect, Good, Indistinct 
Luster
Vitreous - Silky 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5-4 

Data courtesy of Webmineral.

Special Info
Type Locality

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