Dims: 1-7/8" x 1-3/4" x 1-1/4"
Wt: 3.26 oz
Thompson Open Pit, Thompson, Manitoba, Canada
Another "clamshell" of Millerite, this specimen is made up of two 3/8-inch rectangular layers of the mineral that have intersected each other at one end at an acute angle, creating a crevice in which grow countless hairlike needles of the nickel sulfide mineral. The exterior face of one of the layers is likewise coated with the needles, and is surprisingly undamaged. Looking down their lengths, these crystals appear to make a dense, dark brown mat. A cross-section of one of the layers reveals the fibrous habit, dull golden color, 1/4-to-1/2-inch length and metallic luster of the crystals. A small amount of noncrystalline quartz is attached to a few spots on the specimen.