Newberyite Locality: Skipton Caves (Skipton lava caves; Mt Widderin Caves), Mt. Widderin (Anderson's Hill), Skipton , Corangamite Shire , Victoria , Australia ( Locality at mindat.org ) Newberyite is a rare magnesium phosphate, found first in a series of lava caves in Australia, the type locality (where this specimen is from). This specimen features an aggregate of rather large platy crystals. A fine specimen for this material! 3.2 x 2.5 x 1.9 cm — Photo: Robert M. Lavinsky · CC BY-SA 3.0
Newberyite
Newberyite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Mg(PO₃OH)·3H₂O.
It crystallizes in the orthorhombic crystal system (space group Pbca).
IMA symbol New, grandfathered status — known before the IMA’s founding, named in 1879.
Found in caves, formed directly from bat guano.
It is found associated with Hannayite, struvite (Skipton lava tube caves, Australia); biphosphammite (Petrogale Cave, Australia); monetite, struvite (Paoha Island, California, USA).
The mineral was named to honor James Cosmo Newbery (1843-1895), geologist, Melbourne, Australia, who initially found the mineral.