GEOLOGY & PLANETARY SCIENCE A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site aragonite A carbonate mineral, calcium carbonate (CaCO3). It is formed under special conditions, generally in caverns and hot springs. Present day mollusc shells are made of aragonite. It readily converts to calcite (another mineral form of calcium cxarbonate). It occurs as orthorhombic system groups of needle-like crystals or massive deposits. Its appearance is glassy white. Hardness 3.5–4, specific gravity 2.9. Related category    • GEOLOGY AND PLANETARY SCIENCE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP