10 mm sperrylite crystal, Broken Hammer Prospect,
Val Caron, Sudbury, Ontario, Canada
One of three zones of large crystals was about a foot into the wall, in broken massive chalcopyrite. Beyond that, and a little higher was another cluster, and then a third. A few more large, single crystals were found beyond that. In the surrounding rock were quite a few smaller crystals as well. The chalcopyrite was about 4 inches thick. Above that was a void filled with the rotted epidote, sulfide mud, which had quite a bit of material in it, and above that was the gossanous sulfide/epidote breccia, again, some large crystals were found in this material. The whole zone was sitting tight to and above a large block of diabase. It started about 3 feet down from the rim of the pit, and went upwards at about a 45 degree angle, to the surface. It was about a foot or so wide.
4.5 mm sperrylite crystal on quartz-epidote matrix
On the last day of bulk sample project, a large tracked excavator was sitting right above the sperrylite zone, reaching down and tearing the wall apart, and loading it into trucks to take to the crusher. Johnson said he has no doubt that large numbers of spectacular crystals went through the crusher and were shipped to the mill. He said he did pan some of the material, which produced about 700 grams of sperrylite in a small glass jam jar - that's about $23,000 worth of platinum! The two loose crystals that we have on eBay right now came from that jar. After he took the better loose crystals out, he was left with about 600 grams or so, which is still in the jar. It gets trotted out to show investors every once in a while, along with a few more of the big crystals on some specimens that haven't been prepared yet.
10 mm sperrylite crystal on quartz-epidote matrix
Specimen photos © www.TreasureMountainMining.com
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