@tomb101,
hard to really tell from your picture but Ill bet its either a specimen of Sphalerite with Tetrahedrite
or its a good crystal form of Bornite
These are all sulfides so you can test my guesses by knocking a teeny hunk off the rock and holding it in a lit match, you should get whitish smoke and a wiff of burning sulfur,(dont stand there breathing it) andif its bornite, itll keep burning blue. (ONLY do this smell test quickly because tetrahedrite contains antimony
We call Bornit "peacock ore" because it shows these blue and reddish colors and if those ARE bornite crystals, youve got a nice specimen.
It almost looks like its been prepped beforehand.
Sure this didnt come out of a collection?