Alamosite, (w. Melanotekite and Plumbotsumite)

Chemistry: PbSiO3
Size: 50 x 35 x 45 mm
Owner: MIM
Photographer: Not Provided

Sheaves of slender, sub-parallel, colourless-white crystals of alamosite (to 20 mm), spotted with tiny green-black globules of melanotekite.  Pseudo-hexagonal, tabular crystals of off-white plumbotsumite (to 2 mm) are associated, although these are hard to distinguish in this photograph.