DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Iridescence in labradorite rock. Iridescent colours on a cut crystalline labradorite surface. Labradorite is an aluminium silicate that also contains sodium and calcium. It is a member of the feldspar group of minerals. The crystalline structure of the rock causes the iridescence seen here.
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