Roger Weller, geology instructor
email@example.com copyright 2010-R.Weller
Datolite is a hydrous calcium boron silicate often associated with zeolites in basalt.
The datolite from northern Michigan occurs as cryptocrystalline fillings within gas
bubble holes in basalt (amygdules). The most common color of the Michigan
datolites is white but they be colored various shades of grayish pink by inclusions
of microscopic-sized flakes of native copper.
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Just credit photo to R.Weller/Cochise College.