Originally named after the primary source at the Mohawk Mines (copper mines) in Mohawk, Michigan, Mohawkite is a rock that closely resembles fine gold in quartz from California.
Algodonite and domeykite are the two principal arsenides found in the Keewenaw. These two minerals when mixed with arsenian copper form Mohawkite. Mohawkite is one of them many historical names for this mixture. The Mohawk #2 as well as mines at Ahmeek were the primary source for this rock. A little know factoid is that over 100 metric tons of Mohawite were removed from the Mohawk mine between 1900 and 1901. The Mohawkite was massive in nature. 
I have hunted Mohawkite on organized trips in the Keweenaw. I believe the Mohawk spoil piles are private property so make sure permission is gained before going on these piles. Mohawkite is elusive and requires some luck and a good metal detector to find.
I always treat Mohawkite with respect when working with it, always using gloves and a mask when grinding and polishing. I also change the water on the Genie and any saws I use after finishing with Mohawkite.
After the Mohawkite cabochon is polished, it is fairly docile (unless you plan to eat it!). I have been experimenting with coating the cabochon with industrial epoxy. This seals the metals against tarnish, but having said this, some people like the tarnished-natural look and prefer a natural, polished stone.
Mohawkite is an unusual and obscure jewelry material, and one of those special rocks to be found only in my favorite rock hunting location, the Keweenaw Peninsula.
I sell Mohawkite jewelry both on this website and at our art shows.