Amblygonite

(Li, Na)AlPO₄(F,OH)

These samples of amblygonite are displayed in the Smithsonian Museum of Natural History. Amblygonite is a phosphate mineral which is a minor source of lithium . It has the composition (Li, Na)AlPO₄(F,OH). This sample is about 10 x 20 cm and is from Lavra da Ilha, Taquaral, Minas Gerais, Brazil.

Amblygonite occurs only in pegmatites. It rarely shows its crystal shape as clearly as in this pale yellow-green specimen with sprays of eosphorite.

Amblygonite is the fluoride analog of montebrasite.

These amblygonite gems are from Minas Gerais, Brazil. They are 62.6 and 57.8 carats.

This amblygonite sample is from Teofelo Otoni, Minas Gerais, Brazil. It is about 16x16 cm.