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Brochantite


Mineral: Brochantite, Quartz
Chemistry: Cu2+4(SO4)(OH)6
Size: 60 mm; (FOV for close-ups is c. 25 mm)
Owner: Malcolm Southwood
Photographer: Malcolm Southwood

Acicular crystals of brochantite (to 9 mm; analytically verified), forming loose, radial sprays and mats on a matrix of highly silicified, iron-stained, and brecciated dolostone (?).  A few milky, terminated quartz crystals (to 7 mm) are also present.