Locality: Poona District, Maharashtra, India
Size: 86 mm x 67 mm x 34 mm (3.4 in. x 2.6 in. x 1.4 in.)
Weight: 154 g (5.4 oz.)
Cabinet specimen of translucent white prehnite pseudomorphed after laumontite. A pseudomorph forms when a mineral (prehnite, in this case) replaces another (laumontite), while retaining the form of the original mineral.