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Approx weight: 131g
Some hedenbergite quartz like one this produce an odd grainy effect just under the surface near the tip
These sandstone coasters are made of Arizona Sierra sandstone sourced from central Arizona
There are three larger modified rhombohedral crystals perched atop
Aragonite and calcite with pocket of calcite rhombs Dragon's Blood Jasper Approx weight: 131gLocale: 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
