SRB Stone Supplies
Rough Rock, Slabs and Lapidary Materials
ORANGE CALCITE (Mexico). This unusual material is more orange in colour than the photo might suggest.
Calcite is quite a soft material so might be difficult to work (though I've not yet tried).
Pieces are roughly cubic and approx 2in on all sides. Weight approx 0.2 to 0.3Kg (0.4 to 0.7lb)