Cookeite

specimen number:
2351010

location:
Taquaral, Itinga, Minas Gerais, Brazil

description:
A columnar crystal grouping of cookeite crystals. Good example for the species, in good condition.

The Taquaral district near Itinga in Minas Gerais, Brazil, is situated within the Eastern Brazilian Pegmatite Province, a region renowned for complex granitic pegmatites emplaced during regional tectono-metamorphic events. These complex zoned pegmatites developed through fractional crystallization and late-stage hydrothermal activity, producing cavities rich in rare elements. Mining and mineral collecting in this area have a long history targeting gem-quality tourmalines, phosphates, and lithium-bearing minerals. Cookeite commonly occurs here as a hydrothermal alteration or secondary mineral, forming soft, pearly micaceous aggregates coating or pseudomorphing primary tourmalines and other silicates inside the weathered pockets of the pegmatites.

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