Montana · Jefferson County
Past Producer
Pohndorf Mine
Jefferson County, Montana, United States
Gemstone
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USGS source ↗
Commodities
Primary
Gemstone
Commodity type
N
Deposit
Deposit size
S
Orebody form
LENS
Ore control
Pegmatite
Materials
Ore minerals
Amethyst
Gangue
Albite, Apatite, Biotite, Magnetite, Microcline, Muscovite, Quartz, Sericite, Sphene, Tourmaline
Geology
Host rock
Quartz Monzonite · Butte Quartz Monzonite
Associated rock
Quartz Monzonite
Tectonic setting
Boulder Batholith
Alteration
Corrosion
Economic & production
Development status
Past Producer
Identification
Deposit ID
10010552
MRDS ID
D004324
Region
NA
Data score
B
Coordinates
45.86907, -112.35366
References
HEINRICH, E.W., 1949, PEGMATITE MINERAL DEPOSITS IN MONTANA: MONT. BUREAU OF MINES AND GEOLOGY MEMOIR 28, P 48-491949 RECON MBMG MEMOIR 2