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Ixiolite

#56587
SOLD
Ixiolite from Helen Beryl mine, Custer Co., South Dakota, United States - 56587
Ixiolite from Helen Beryl mine, Custer Co., South Dakota, United States - 56587

Ixiolite

#56587
Availability
Sold
Size
3.5 x 2.5 x 2 cm - Miniature 
Formula
(Ta,Mn,Nb)O2 (RRUFF)
Locality
Helen Beryl mine, Custer Co., South Dakota, United States
Tagged
pegmatite mineral

Dull black massive Ixiolite to 1.5cm.

Ixiolite

Formula
(Ta,Mn,Nb)O2 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Irregular Grains 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
gray, black, steel gray 
Streak
dark brown 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal - Uneven 
Hardness
6-6.5 

Data courtesy of Webmineral.

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