Fluornatromicrolite: Naipa Mine, Alto Ligonha District, Mozambique

Description

Species: Fluornatromicrolite
Locality: Naipa Mine, Alto Ligonha District, Mozambique
Size: 8.5 x 5.5 x 3.5 cm.

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An excellent example of the rare tantalum oxide species fluornatromicrolite, consisting of quite large for species emerald-green octahedra to nearly 2 cm in purple lepidolite matrix. While the crystals are not entirely perfect, overall this is a superb example of one of the rarer Ta-Nb species, in very large, attractive crystals. Mined circa 2005, Ex. Geofil Ltd., Ex. Philip Persson collection. Annette Slade photo.