This specimen does have an old label, but it says "location unknown", plus the word "German". A light grey rock matrix (rhyolite ?) with a shallow cavity covered in porcelaneous white opaque apophyllite crystals. A nice specimen despite the lack of locality. Measures 2.5 x 2.5 x 1.5 inches ( 6.4 x 6.4 x 3.8 cm).