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Jahnsite-(Camnmg)

#BN50208
SOLD
Jahnsite-(CaMnMg) from Tip Top mine, Custer Co., South Dakota, United States - BN50208
Jahnsite-(CaMnMg) from Tip Top mine, Custer Co., South Dakota, United States - BN50208

Jahnsite-(Camnmg)

#BN50208
Availability
Sold
Size
9 x 6 x 4 cm - Sm Cabinet 
Formula
CaMn2+Mg2Fe3+2(PO4)4(OH)2·8H2O (RRUFF)
Locality
Tip Top mine, Custer Co., South Dakota, United States
Tagged
phosphate , pegmatite mineral

Dark reddish brown striated crystals of Jahnsite with good rich coverage on Quartz and Triphyllite.

Type Locality

Jahnsite-(CaMnMg)

Formula
CaMn2+Mg2Fe3+2(PO4)4(OH)2·8H2O 
Crystal System
Monoclinic 
Cleavage
Good, None, None 
Luster
Vitreous - Adamantine 
Color
brown, purplish brown, yellow, yellow orange, greenish yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
4 

Data courtesy of Webmineral.

Collection
Dr. Buford Nichols Collection
Special Info
Type Locality
Mineralpedia
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