Dims: 1.8" x 1.8" x 1.3" (4.6 x 4.6 x 3.3 cm)
Wt: 4.09 oz. (115.9 g)
Pellegruvan, Riddarhyttan, Vastmanland, Sweden
This small hand specimen consists of at least 10 Cobaltite crystals that are partially embedded in a brown, muscovite-laden matrix rock. While none of these crystals show any human-induced damage, their forms are rather rounded for the most part, and several of the crystals are incomplete due either to growing conditions or to intergrowth with each other. The largest of these crystals has a diameter of 0.2" (5 mm), and though it is incomplete, it shows the best pyrithohedral form of the group. All have a bright, silvery color and a metallic luster and are, of course, opaque.