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Marcasite on Calcite

#49719
SOLD
Marcasite from Elk Creek, Meade Co., South Dakota, United States - 49719
Marcasite from Elk Creek, Meade Co., South Dakota, United States - 49719

Marcasite on Calcite

#49719
Availability
Sold
Size
4.5 x 3.5 x 3.5 cm - Miniature 
Formula
FeS2 (RRUFF)
Locality
Elk Creek, Meade Co., South Dakota, United States
Tagged
sulfide

Small Marcasite crystals in Worm-like formations. This is a very unique crystal habit for this area.  

Marcasite

Formula
FeS2 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Stalactitic, Globular 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
bronze, light brass yellow, tin white 
Streak
gray brownish black 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
6-6.5 

Data courtesy of Webmineral.

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