Dims: 5.83x4.71x2.89" (14.80x11.96x7.33cm)
Wt: 72.79oz (2060g)
Monroe County, Michigan, USA
This is a large chunk of siltstone which contains a cavity lined with celestite crystals. The crystals are transparent and a pretty "celestial" blue, generally having a diamond shaped cross-section and roof terminations, with many of the smaller crystals showing different shapes.