15hlkm.is ((COPPER on GREENSTONE)), $10 MINIMUM BID, Greenstone Quarry, Adams Co., Pennsylvania, 10 x 4 x .6 cm, Cabinet | |
Epidote-Rhyolite matrix is know as Greenstone and is quarried for use as an aggregate in the making of roofing shingles by the GAF Corp. Natural Copper occurs in veins with associated Quartz |