Volborthite - Milpillas Mine, Mexico - 3 x 2.5 x 2 cm / main crystal: 1.8 cm.

Mineral: Volborthite
Locality: Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
Dimensions: 3 x 2.5 x 2 cm / main crystal: 1.8 cm.

Description: Mass: 10 g MIM number: 1486 Very smooth and lustrous dark green crystals, some in a V-shape (probably twinned crystals), partially hollow, the whole on a little bit of gray matrix Photographer: FMI / James Elliott; Publications: "Lapis: Aug 2017", "Mineralogical Record, Sep-Oct 2021"