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Pellyite with Macdonaldite & Titantaramellite

#42230

Pellyite with Macdonaldite & Titantaramellite

#42230
Availability
Sold
Size
5 x 3.5 x 2.5 cm - Miniature 
Formula
Ba2CaFe2+2Si6O17 (RRUFF)
Locality
Esquire #8 claim, Big Creek, Fresno Co., California, United States

This is a good combination specimen with several rare minerals. The main mineral occurs as a 9mm thick vein of brown, crystalline Pellyite with scattered Titantaramellite (white arrow) crystals to 2mm. Along one side is an altered area in which occurs white to colorless acicular Macdonaldite (blue arrow), an extremely rare mineral.

Pellyite

Formula
Ba2CaFe2+2Si6O17 
Crystal System
Orthorhombic 
Crystal Habit
Massive 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, light yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness

Data courtesy of Webmineral.

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