Blue platy crystals to 0.5 mm in
albite
matrix associated with minor
fluorapatite.
Light blue platy crystals to 1 mm.
Origin: Gentil mine, Mendes Pimentel, Minas Gerais, Brazil (type locality)
Sample size: 3 x 2 x 2 cm (top), 5.5 x 2.5 x 1.5 cm
(bottom)
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