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RM3001   Hydroxilherderite with albite

Valle de Piauí, Taquaral, Itinga, Minas Gerais, Brazil

In this specimen we can observe numerous prismatic crystals of hydroxylherderite, an unusual calcium and beryllium hydroxylphosphate, with a very uniform beige color, very well defined faces and edges and with twinning. They are disposed on a matrix formed by albite crystals. The specimen is from the Piauí Valley, an area very rich in lithium-bearing pegmatites.

Size: 6.4 x 4.7 x 3.9 cm.
Main crystal: 1.4 cm.