Home > American Minerals – January 11 > MS1994 Aragonite (Texas!)

Aragonite (Texas!)

Aragonite is calcium carbonate, polymorphous with calcite. The mineral name recalls its original discovery at Aragon, Spain (Haüy, 1791). While aragonite has orthorhombic symmetry, its crystal form is pseudo-hexagonal due to cyclic twinning.

This is a pseudo-hexagonal aragonite twin, 5.5 × 5.2 cm and 2.8 cm thick. The crystal incorporated red clay during growth, causing it to appear reddish. However, along the girdle of the specimen, the aragonite shows a pale violet color. A vintage specimen from Texas, likely dating to the 1960s.

Price: $125

Item code: MS1994

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