Aragonite and calcite (repaired) Caribbean Calcite caused by the intergrowth of

caused by the intergrowth of two varieties of feldspar

The specimen has formed botryoidal (round

some material can phosphoresce for several minutes

and appears off-white in contrast to the black tourmaline

184g  E 4

Aragonite and calcite (repaired) Caribbean Calcite caused by the intergrowth ofLocale: Sidi Ayed, Fs Mekns Region, Morocco Approx dimensions: 3. 5 x 2 x 1. 5" Approx size: 285g **Repaired specimen Calcite and aragonite are polymorphs of one another, meaning that the same chemical composition (calcium carbonate) has crystallized into different crystal structures (trigonal and orthorhombic, respectively). Calcite and aragonite often grow together, and the two minerals are also frequent paramorphs of one anothera pseudomorph of the