Hydrocarbon on Fluorite (rare & rare locale) Ross Lillie Coll.

M. F. Oxford No. 7 Mine, Ozark-Mahoning group, Hardin Co., Illinois
Small Cabinet, 6.4 x 5.9 x 5.4 cm
Start Time: 04/14/2016 6:30:00 pm (CDT)
End Time: 04/21/2016 6:30:00 pm (CDT)
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Item Description

A RARE and striking golden-yellow fluorite cube from this obscure extinct fluorite mine. The gemmy, stepped-growth cube is richly covered with lustrous hydrocarbon (bitumen). The dead hydrocarbon does not fluoresce, while the fluorite does. Self-collected by Ross Lillie (# 0230) in the down-dropped graben block in July, 1981. An important rarity for the famous district.

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