Sacrofanite

specimen number:
2351009

location:
Sacrofano Quarry, Rome, Lazio, Italy

description:
Colorless grains and partial crystals on matrix. Nice for the species.

The Sacrofano Quarry, located within the volcanic Sabatini complex of the Lazio region in Italy, sits inside the ancient Sacrofano Caldera. The regional geology is characterized by potassic volcanic rocks and ejected blocks embedded in pyroclastic deposits. The quarry and surrounding Valle Biachella area are famous among mineral collectors for yielding diverse accessory minerals formed in volcanic vugs and cavities. It serves as the type locality for sacrofanite, a rare complex silicate mineral belonging to the cancrinite group, which typically occurs as tiny, transparent to translucent crystalline coatings inside ejected volcanic ejecta blocks alongside associates like sanidine, andradite, and hauyne.

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