.	Dwarves' Earth Treasures Online Museum: Central Datolites Central & Central Exploratory Mines, Keweenaw Co., Michigan	.

.    Central Mine was one of the longest running fissure mine and that is an unusual case since the fissure based mines tend to be short lived and is well known for so much copper produced from the mine. Even so, datolite is not common there and once they're found, they tend to be colorless. There was a story of how a Central miner took a fancy to the datolites and he collected any datolites he find as he hauled the rocks up from the underground mines. So it's possible to see any white and coarse grained Central datolites in the old collections.
   Central Exploratory Mine is an exploratory mine to test its potential for copper mining and there had been some mining efforts there that bought copper, silver and especially datolites up to the surface. The datolites are mostly white and some are dotted with black spots. I have yet to see any colorful datolites coming from the site since the datolites just recently showed up during the bulldozing of Central Exploratory piles. There are nearby mines such as Northwestern, St. Clair and Dana and few datolites appeared to have been found there.
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I actually found this at the end of Washington Mine Road. Construction crew brought the rocks from Central to pave the dirty road. A find of copper chisel chip found at the same place also confirmed its location. August 2010	Coarse grained datolite Central Mine
Central Exploratory Mine	Typical white datolites from Central Exploratory Mine Found by Jeffrey A. August 2010
Dotted with some orange coloration. Central Exploratory Mine Found by Jeffrey A. August 2010	With dots and faint yellow hue, Central Exploratory Mine Found by Jeffrey A. August 2010

Typical white datolites from
Central Exploratory Mine
Found by Jeffrey A. August 2010