All specimens are from collection of the Geological Society "Spirifer".

All photos by Jeff Scovill (www.scovilphoto.com).

Celestite. 8 cm. Machow, Poland.

Celestite on sulphur. 11 cm. Machow, Poland.

 Sulphur on calcite. 5 cm. Machow, Poland.

Celestite. 9.5 cm. Machow, Poland.