Aragonite and calcite with botryoidal side Chalcedony nodules There is an odd crystal

There is an odd crystal formation inside this hollow

The "Yellow Zebra" morph of Armadillidium maculatum is black with yellow stripes

then a thick layer of translucent white chalcedony

in the case of Option F

When you see the variety of shapes these specimens come in

Aragonite and calcite with botryoidal side Chalcedony nodules There is an odd crystalLocale: Sidi Ayed, Fs Mekns Region, Morocco Approx dimensions: 2. 25 x 2 x 1. 5" Approx size: 185g 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 same chemical