Locality: Všechlapy, Zabrušani, Teplice, Ústí Region, Czech Republic
Size: 99 mm x 82 mm x 39 mm (3.9 in. x 3.2 in. x 1.6 in.)
Weight: 345 g (12.2 oz.)
Ivory calcite pseudomorph after aragonite with calcite crystals to ~1.5 mm. A pseudomorph forms when a mineral (calcite, in this case) replaces another (aragonite), but retains the form of the original mineral. There is some damage on the upper/back portion where you can see the hollow left by the dissolution of the aragonite.