LaFarge Quarry, Buffalo, Scott County, Iowa.
Milky to clear crystals, the largest are 1cm, most are 1mm to 5mm, generously coating an area about 7x7cm, with associated micro pyrite crystals, on dolostone. A few of the crystals will fluoresce weak light orange under short-wave ultra-violet. Some bruising.
10x12x7cm Weight 750 g (about 1.6pounds)