Locality: Winfield, Union County, Pennsylvania, USA
Size: 160 mm x 61 max 40 mm (6.3 in. x 2.4 in. x 1.6 in.)
Weight: 397 g (14.0 oz.)
Clear calcite to 7 mm on matrix, with spheroidal aggregates of ivory strontianite composed of thin, pointed crystals. There is contact on one of the strontianite spherules, where it appears a calcite crystal used to be. Shows some fluorescence under short wave UV light.