Locality: Marble Quarries, Estremoz, Évora, Portugal
Size: 88 mm x 31 mm x 43 mm (3.5 in. x 1.2 in. x 1.7 in.)
Weight: 89 g (3.2 oz.)
Interesting specimen of twinned calcite crystals, the largest of them 55 mm in width, set on a bed of smaller calcite crystals on matrix. The largest crystal has a contact on the side where it was separated from adjoining crystals. There are a few very small nicks on the crystal edge as well. Nice translucency and good form.