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Alstonite

#39941
SOLD
Alstonite from Minerva #1 mine, Hardin Co., Illinois, United States - 39941
Alstonite from Minerva #1 mine, Hardin Co., Illinois, United States - 39941

Alstonite

#39941
Availability
Sold
Size
2 x 1.5 x 1 cm - Thumbnail 
Formula
BaCa(CO3)2 (RRUFF)
Locality
Minerva #1 mine, Hardin Co., Illinois, United States
Tagged
carbonate

White rice-shaped micro crystales to about 1mm. Alstonite is a rare barium carbonite found in only two localities in the USA, and a handful across the world.

Alstonite

Formula
BaCa(CO3)2 
Crystal System
Triclinic 
Crystal Habit
Euhedral Crystals, Pseudo Hexagonal 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, gray, white, pink 
Streak
white 
Class
Triclinic 
Fracture
Uneven 
Hardness
4-4.5 

Data courtesy of Webmineral.

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