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Dwarves' Earth Treasures Online Museum:
Drexel & Connecticut Datolites
Drexel  & Connecticut Mine, Delaware, Keweenaw CO., Michigan
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    Drexel and Connecticut Mines are obviousily a failed attempt to locate the copper-rich lobes since the mine dumps are very small and the datolites started showing up from those mine dumps very recently. While most Drexel datolites are white to opaque, few datolites are very similar to those of Delaware (pink color) and it happens that both Connecticut and Drexel Mine are just a mile (or two?) west of Delaware Mine. Some datolites also include some copper inclusions. I managed to find few datolites at one spot at Drexel mine and there may be few more waiting to be found at both mine dumps.

Drexel Mine

Typical white datolite,
found by JeffreyA., August 2007		 Rare datolite wtih red dots.
Typical opaque datolites,
found by JeffreyA., August 2007		 Rare colored datolites
some with copper inclusions.

Connecticut Mine

Rare orange datolite White with cool arangement of red dots