Unique Specimens
One-of-a-kind specimens sourced by Dr. Cotter, who has travelled to 50+ countries worldwide.
Fragmental Flow Top w/ Copper
$1,350.00
Ocean Jasper Sphere
$3,500.00
Michigan Float Copper
$850.00
Michigan Float Copper
$1,800.00
Michigan Float Copper
$5,500.00
Mohawkite: Silver Rich Ore
$1,550.00
Copper Obelisk
$2,500.00
Copper-Rich Ore Slab
$1,150.00
Michigan Float Copper
$3,350.00
End-Cut of Michigan Native Copper
$2,750.00
Copper Bookends w/ Calcite
$3,500.00
Michigan Native Copper
$775.00
Copper Obelisk
$2,800.00
Copper Crystals
$15,000.00
Acid Etched Copper
$1,350.00
Michigan Float Copper
$3,350.00
Calcite Casts in Copper
$5,500.00
The 22nd Street Show
$2,500.00
Custom Orders
$13,500.00
Copper-Silver Nugget
$1,350.00
Copper, Datolite & Silver Slab
$3,500.00
Pink Patagonia Agate
$3,500.00
Crazy Lace Agate Core
$1,750.00
Crazy Lace Agate Core
$1,850.00
Lake Superior Agate (12oz)
$1,250.00
Copper, Datolite & Silver
$4,500.00
Copper Crystals
$11,750.00
Copper-Silver Crystals
$18,500.00
Copper-Silver
$7,500.00
Michigan Native Copper Crystals
$4,800.00
Mohawkite End-Cut
$13,500.00
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