Four Treasures Reference Database
Record No. 2363
Montana’s Big Sky Sapphires
Journal Article
Hughes, R.W. (1995) Montana’s Big Sky Sapphires. JewelSiam, Vol. 6, No. 4–5, Aug–Sept, pp. 83–88; Oct–Nov, pp. 51–54.
ISBN/ISSN: 8581843 | RWHL
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R.W. Hughes, corundum, USA.12, Montana.12, gems
History and description of Montana’s sapphire mines at Yogo Gulch, the Missouri River, Dry Cottonwood Creek and Rock Creek.