| 6hlkmir ((COPPER on SERPENTINE)), $15 MINIMUM BID, Greenstone Quarry, Blue Ridge Summit, Adams County, Pennsylvania, 20 x 8 x 3 cm, Cabinet, | |
 | Here is a large specimen of the greenstone, aka Serpentine, laced with Copper from a locality in Pennsylvania. It is from an older stash of copper specimens from the quarry. Copper localities each of the Mississippi are uncommon. The Quarry mined greenstone for industrial uses such as in roofing shingles. |
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