[uh-rag-uh-nahyt, ar-uh-guh-] 
| a mineral, orthorhombic calcium carbonate, CaCO3, chemically identical with calcite but differing in crystallization and in having a higher specific gravity and less marked cleavage. |
| a·rag·o·nite (ə-rāg'ə-nīt', ār'ə-gə-) n. An orthorhombic mineral form of crystalline calcium carbonate, dimorphous with calcite. [After Aragon.] |
| aragonite (ə-rāg'ə-nīt', ār'ə-gə-) Pronunciation Key
A usually white, yellowish, or pink orthorhombic mineral that can occur in many different colors. Aragonite occurs as acicular (needlelike) or tabular crystals, or as fibrous aggregates. It is found in gypsum deposits, at the tips of calcite crystals, in mollusk shells and pearls, and in living reef structures. It is a polymorph of calcite. Chemical formula: CaCO3. |
əˌnaɪt