Danburite
San Luis Potosí, Mexico
Dimensions: 3.9 × 1.7 × 1.3 cm
Provenance: Original collection label, catalog no. 532, identifying the specimen as “Milky Danburite” from San Luis Potosí, Mexico.
Locality note: The more specific locality is likely Charcas, Charcas Municipality, San Luis Potosí, Mexico, a well-documented source of danburite. However, the original label identifies only San Luis Potosí.
An elongated, milky-white danburite crystal displaying translucent to nearly transparent areas with a soft vitreous luster. The crystal exhibits well-defined prismatic faces with delicate longitudinal striations, subtle internal veils, and fine growth features that catch and reflect the light. Its pale, icy appearance is complemented by natural internal inclusions and a partially developed termination.
Danburite is a calcium borosilicate mineral, CaB₂Si₂O₈, valued for its distinctive orthorhombic crystal structure, glassy luster, and exceptional clarity in its finest examples. Its characteristic elongated prisms often exhibit subtle internal textures that create fascinating optical effects.
San Luis Potosí, Mexico, is a recognized source of collectible danburite crystals, particularly from the Charcas mining district. The region is known for producing elongated, colorless to milky-white crystals, including specimens with impressive transparency and well-developed crystal faces.
