Home > Type Localities – March 17 > MS1533 Cornetite


Cornetite is a hydrous copper phosphate. Cesáro (1910) originally noted the mineral at L'Étoile du Congo. However the species remained unnamed until Buttgenbach (1916) named the mineral after Jules Cornet (1865-1929). A later study by Berry (1950) further describes the history of its discovery.

Cornetite here crystallized on a fracture surface of sandstone matrix, as bladed crystals to 6 mm across. Specimens of cornetite like this were distinctive and generally available through the 1990s. A dealer label from Gilbert Gauthier (1924-2006) accompanies the specimen.

Price: $125

Item code: MS1533

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