Dims: 1.1 x 0.8 x 0.7" (2.8 x 2.0 x 1.8 cm)
Wt: 23.2 g w/ specimen box
Scholler Mine, Kladno, Czech Republic
Several very small Sal Ammoniac crystals rest on the rusty, chalky host rock of this specimen. These crystals do not exceed 0.3" (8 mm) along any axis, but appear to be in generally good condition, though a few of the larger ones on the edges of the host rock may be damaged and incomplete. The crystals have excellent and complex cubic-based form, which may be gyroidal. Their edges are relatively well-defined and their faces are clean and possess a luster that ranges widely from waxy to vitreous. All are colorless, transparent, and extremely clear- almost all interference with clarity is caused by surface patinas. The material on which they rest strongly resembles shale, but it is rather rusty. It is also glued to the base of an oblong plastic specimen box with a clear, removable cover.