Thursday, 19 February 2015


Anorthocite or white Feldspar (CaAl2Si2O8) is found in a few locations on Earth and is the main constituent of the the moon's white surface - the black craters in between revealing the black basalt core beneath.

Anorthocite, collecting on Iona, with geologist Dr John Faitthfull, curator at the Hunterian Museum Glasgow.

Anothocite outcrop

Basalt map of Scotland


Anorthocite chips

White marble and Anorthocite

Anorthocite cheese cake with strawberry anemone

Black basalt

The Anorthocite is collected near the Iona Marble Quarry on the south of the Island.

Anorthocite chips

Lump of Anorthocite

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