aragonite, arr-Min.|ˈærəgənaɪt|[named by Haüy, 1800, from Aragon or Arragon, a province of Spain, where first found + -ite.]A carbonate of lime, crystallizing in orthorhombic prisms and many derived forms, whence several varieties are distinguished.1803Bournon Carbonate of Lime in Phil.Trans. XCIII. 332 Their specific gravity is nearly the same. The Abbé Haüy states that of the Arragonite at 2946.1837Dana Min., Aragonite.1863Watts Dict.Chem. I. 358 Carbonate of calcium, in its two forms of calc spar (rhombohedral) and arragonite (rhombic or right prismatic) exhibits one of the most striking examples of dimorphism.