Unidentified silver rock?

[Lakota]

Found this a while back but know one can identify it. College don't have the equipment to run some ultrasonic test. Nickel mixed with copper is my guess. It is mixed with quartz crystal which eliminates meteorites. It is very heavy for it size and extremely hard. I grind into it but took a long time. Very hard but I was able to smooth a part out. Just a shiny smooth surface showed. Test for silver and showed only slightly but look at the splinters. Also looks like copper on parts or even gold. Pretty stumped any idea's. Lead or pyrite is to soft. Like I said hard to grind into it with disc wheel. Charleston is one of the oldest cities and I hope someone can recognize the structure of this. It transfers heat very fast also and cuts through ice.

 

[Lakota]

One more thing it slightly sticks to a magnet. Not fully but enough to stick to it.

 

[Back-of-the-boat]

Pyrite

 

[DDancer]

Check around the pawn shops and jewlers and see if one of them has an XRF device to get a read on the material. Might even be one at a local college geology dept. Looks like a pyrite with bornite in it. Pyrites are pretty hard, not soft like lead, and if dense have many of the same characteristics your describing.

 

[smokeythecat]

Look up Loellingite. It's found with quartz in pegmatites.

 

[Lakota]

Looks like pyrite but it don't streak or it very light grey. It don't oxidize or tinge so it shiny for two years now. Weird find but hey has some silver.