Dims: 1.5 x 1.1 x 0.7" (3.8 x 2.8 x 1.8 cm)
Wt: 23.7 g w/ specimen box
Scholler Mine, Kladno, Czech Republic
At least 30 Sal Ammoniac crystals rest on the rusty host rock of this thumbnail specimen. They are generally in excellent condition- almost no damage is visible- and range in diameter from less than 2 mm to nearly 0.3" (8 mm). Though several of them are moderately to severely warped, most have excellent cubic-based crystal form; they commonly take on what appears to be a gyroidal form, though there do appear to be one or two definite trapezohedrons present. All have well-defined edges and clean faces that possess a generally vitreous luster. They are colorless, transparent, and extremely clear, containing almost no visible internal fractures or flaws. The host rock on which they rest has the appearance of a rust-covered shale, and is hot-glued onto the base of an oblong plastic specimen box, whose clear cover is completely removable.