Mine detail: Yogo Sapphire Mine

Previously called 'American Mine'

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Location

Lat / long:

46.8713, -110.34472

Resource(N)

Primary:	Gemstone
Orebody form:	DIKE
Discovery year:	1880

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Producer
First production started:	1895

Geology

Host rock:	Madison Limestone
Host type:	Limestone
Structure:	East Flank Of Domal Uplift Little Belt Mts.

References

MRDS	W013397
DEP	10070455
Reference	CLABAUGH, S. E., 1952, CORUNDUM DEPOSITS OF MONTANA: U.S. GEOLOGICAL SURVEY BULL. 983, P. 6 - 3
Reporter	Berg, Richard B. (Krohn, D. H.)