Axinite Archives - Cochise College Geology

Axinite

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Chemical Group: Silicate

Chemical Formula: Ca₇Mn₄B₂(SiO₄)₈

Color: Clove-brown, plum-blue. pearly-gray, honey-yellow, greenish yellow

Streak: Uncolored Luster: Highly glassy

Hardness: 6.5 to 7 Specific Gravity: 3.27-3.29 Fracture: Conchoidal

Cleavage: (010) distinct

Crystal Forms and Habits: Triclinic system. Crystals are broad an thin-edged. Habits include lamellar, granular.

Mineral Associations: Found in cavities in granite

Uses: In rare cases as a gemstone

USA occurrences:
New Jersey: Franklin
Pennsylvania
California: Feather River Canyon, Coarse Gold, Madera County, Taylorsville, Genesee Valley

WORLD-WIDE occurrences:
Mexico: Sierra Juarez district, Baja California, Mina Olivia, Laguna Hanson, Los Gavilanes,
France: St. Christophe, Bourg d’Oisans, Isere
England: Botallack, Wheal Cock, Trewellard, and Lostwithiel, Cornwall
Japan: Obira mine, Oita Prefecture, Toroku mine, Miyazaki Prefecture
Brazil

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Photos

Axinite 1 2 3 4 5 6

axinite-dark brown cleavage surfaces — Axinite - Dark Brown Cleavage Surfaces

axinite-brown crystals-close view — Axinite - Brown Crystals - Close View

axinite-gray cleavage surfaces — Axinite - Gray Cleavage Surfaces

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