Aragonite and calcite with pocket of calcite rhombs Chalcedony nodules though it does have some

though it does have some interesting cactus-quartz growth on that top portion

creating a bold line that touches the surface on one side

I've found White Sharks to be a bit antisocial

but overall reaction is poor

Locality: Mexico

Aragonite and calcite with pocket of calcite rhombs Chalcedony nodules though it does have someLocale: Sidi Ayed, Fs Mekns Region, Morocco Approx dimensions: 3. 5 x 2 x 2" Approx size: 425g (0. 9 lb) 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