Dims: 2.7 x 1.6 x 0.9" (6.9 x 4.1 x 2.3 cm)
Wt: 1.9 oz. (54.0 g)
Willow Creek, near Nanton, Alberta, Canada
This single twinned crystal is not as clear as some of the smaller crystals from this locality that are in our stock, as it contains a few planar, "dirty" inclusions of a fine brown material and a few dirt-filled internal fractures that run along cleavage planes. It is colorless, transparent and still quite clear, however, so that when viewed against a dark background under strong light, one can see two other internal flaws that are otherwise nearly invisible. These flaws consist of extremely narrow gaps that extend into the crystal and run along one of its cleavage planes. Their presence is given away by patches of rainbow-colored iridescence that interfere with clarity only very little. The crystal has excellent, though imperfect form, with well-defined edges and smooth faces that possess the standard pearly luster. Two very small scuff marks are present on the piece; otherwise, it is undamaged and in excellent condition. There is, of course, no host rock.