.	Dwarves' Earth Treasures Online Museum: Quincy Area Datolites Quincy Mine, Hancock, Houghton Co., Michigan	.

 .    "Old Reliable" Quincy Mine is considered a historical landmark of the Copper Country, a nickname for copper producing Keweenaw Peninsula, and many of the original buildings are still standing and preserved. The Quincy Mine bisects the Pewabic Lobe famed for its colorful datolites. Over time, datolites had been found in the piles especially when they were bulldozed or hauled away for rock crushing. White, green, yellow, pink, red, peach, salmon, and orange are the examples found there and some come with copper specks. It's safe for me to say that the miners hit several different seams of datolites, resulting in few different varieties.
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Unusually pinkish orange color	Classic yellow color
Red datolite from Quincy!  Delaware datolites don't have epidote inclusions.	Rare light green one from Quincy Mine
With flake like copper inclusions	Vein of datolite
	Pink and yellowish hues
With copper inclusions	Multicolored