Dims: 4.2 x 2.7 x 1.2" (10.7 x 6.9 x 3.0 cm)
Wt: 5.95 oz. (168.5 g)
Ropes Mine, Marquette County, Michigan, U.S.A.
This specimen consists of a crust made up of almost micaceous, malformed Talc crystals that partly cover a base of what appears to be rusty quartzite and feldspar. The talc has a green color and a pearly luster, and has a form and habit that are very much like those of mica schist. There do not appear to be any discernable crystals among the formation, but the Talc definitely occurs as warped and intergrown blades. There is some black material sandwiched between the Talc and the siliceous base that I think is merely black Talc, as it is rather soft (though seemingly not as soft as the green Talc on top of it).