a generally white or grey mineral, found in sedimentary rocks and as deposits from hot springs. Composition: calcium carbonate. Formula: CaCO3. Crystal structure: orthorhombic
Word origin
C19: from Aragon + -ite1
aragonite in American English
(əˈrægəˌnaɪt; ˈærəgəˌnaɪt)
noun
a semihard, orthorhombic mineral resembling calcite, made up of calcium carbonate, CaCO3: it is found in sedimentary and metamorphic rocks and in the skeletons of marine organisms