Aragonite and calcite with pocket of calcite rhombs Dragon's Blood Jasper There is additionally a cluster

There is additionally a cluster of calcite crystals at the entrance of the geode

Approx weight: 772g

These sandstone coasters are made of Arizona Sierra sandstone sourced from central Arizona

Some hedenbergite quartz like one this produce an odd grainy effect just under the surface near the tip

Aragonite and calcite with pocket of calcite rhombs Dragon's Blood Jasper There is additionally a clusterLocale: 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