Boleite with Paratacamite and Gypsum

A 3.5 x 2.5 cm area is richly invested with deep inky-blue cubic crystals of Boleite, the largest crystals measuring 5 mm on edge and all with a brilliant and highly reflective lustre. The matrix of sucrosic Quartz also has many smaller Boleite crystals on its back face and is shot through with sea-green microcrystalline zones of Paratacamite. Adjacent to the main species are small areas of white crystalline Gypsum. A first-class Boleite specimen from the Amelia mine at Santa Rosalía, in the Boleo District of Baja California, Mexico.