HYDROXYLHERDERITE

$300.00

$40.00 shipping
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Tucson, Arizona, USA

7,543 for sale·132 sold

An interesting thumbnail twin of a creamy, opaque Hydroxylherderite crystal measuring to 2.8 cm, from Barro do Salinas in Coronel Murta, Brazil. Hydroxylherderite is a calcium-beryllium phosphate hydroxide [CaBe(PO4)(OH)] whereas Herderite is a calcium-beryllium phosphate fluoride [CaBe(PO4)F], hence the “Hydroxyl” prefix signifying the dominance of hydroxide over fluorine. It is a species associated with granite pegmatites, typically occurring as small indistinct crystals, hence specimens such as this are exceptional for the species.