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Macdonaldite

#REW63854
SOLD
Macdonaldite from Esquire #1 claim, Rush Creek, Fresno Co., California, United States - REW63854
Macdonaldite from Esquire #1 claim, Rush Creek, Fresno Co., California, United States - REW63854

Macdonaldite

#REW63854
Availability
Sold
Size
3 x 2.5 x 2 cm - Thumbnail 
Formula
BaCa4Si16O36(OH)2·10H2O (RRUFF)
Locality
Esquire #1 claim, Rush Creek, Fresno Co., California, United States
Tagged
Ba Silicates , bariium

Radiating Macdonaldite crystals partially replaced by opal. Macdonaldite is a late stage mineral at the barium silicate deposits. It is a product of Sanbornite weathering. Nonetheless it is still a very rare mineral and occurs in only one deposit outside of California.

Type Locality

Macdonaldite

Formula
BaCa4Si16O36(OH)2·10H2O 
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.

Collection
Robert E. Walstrom collection
Special Info
Type Locality
Mineralpedia
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On Dakota Matrix
Previously Sold Macdonaldite
On Dakota Matrix
Other Available Macdonaldite
WebMineral
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Mindat
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