Dims: 4.3 x 3.6 x 1.8" (10.9 x 9.1 x 4.6 cm)
Wt: 9.6 oz. (272.6 g)
Mandata, Northumberland County, Pennsylvania, U.S.A.
At least 20 orhorhombic prismatic Celestite crystals rest on the flat shale host rock of this hand specimen. These crystals are in good condition, though many are visibly damaged or broken. The largest of these has dimensions of 0.5 x 0.4 x 0.3" (1.3 x 1.0 x 0.8 cm) and has a good but disjointed form (see the close-up image), as do all of the others. Their edges are well-defined, however, and their faces are clean and possess a luster that ranges from almost silky to pearly to vitreous. All have the standard pale gray-blue coloration and are transparent, though clarity ranges from high to dim, increasing according to smallness of size. Actually, there are hundreds of Celestite crystals on this specimen, but all but the aforementioned are almost microscopic, not exceeding 1 or 2 mm in any dimension.