Aragonite and calcite with botryoidal side Inner Mongolian quartz The matte brown mineral coating

The matte brown mineral coating the specimen is lizardite

Approx weight: 109g

Properly called "hydroxyapophyllite-(K)

Point length: 4

Aragonite and calcite with botryoidal side Inner Mongolian quartz The matte brown mineral coatingLocale: Sidi Ayed, Fs Mekns Region, Morocco Approx dimensions: 3 x 2. 75 x 2" Approx size: 480g (1 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 chemical