SOLD
RARE16B-141
Oxykinoshitalite with Ulvospinel, Nepheline, Olivine, Augite, Calcite, Apatite, Potassium Feldspar on Olivine Nephelinite
Miniature, 3.0 x 2.0 x 1.0 cm
Fernando de Noronha archipelago, Pernambuco, Brazil
Ex. Paulo Matioli
SOLD

A very interesting piece under the microscope! Vesicles in this olivine nephelinite contain microcrystals of orange-brown, prismatic to platy oxykinoshitalite associated with nepheline, calcite, and an apatite group mineral. An unassuming specimen in hand sample, but fairly remarkable under modest magnification! Oxykinoshitalite is a rare and complex barium potassium magnesium titanium iron layer silicate and a member of the Mica Group. Fernando de Noronha island, Fernando de Noronha archipelago, Pernambuco, Brazil. Ex. Paulo Matioli collection.