Sisco O'Brien Mine, Nicol twp., Gowganda area, Ontario
Size: 11.2x4.8x1.0 cm
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Here an excellent sample of high grade showing some dendritic silver and arsenides from the Siscoe O'Brien Mine, also known as the Miller Lake O'Brien Mine. It is a silver-cobalt mine discovered in 1908, acquired by the Miller Lake 1909 and then Siscoe Mines Limited in 1945. The workings had reached a depth of 1300 feet by 1962 (as reported in "Precambrian" magazine June 1962 issue). Total production up to 1965 was 36,830,000 oz. silver and 786,000lbs cobalt. It was a rich mine!

All prices in Canadian dollars. For payment in US$, deduct 25% or multiply by 0.75.

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