A Geoscience Digital Image Library

TitleCookeite with elbaite
DescriptionCookeite is a silicate with the chemical formula LiAl5Si3O10(OH)8. Cookeite belongs to the chlorite group. It is the alteration of lithia tourmalines and lepidolite in pegmatites. Cookeite is named for the American mineralogist and chemist Josiah B. Cooke, Jr. This sample is approximately 7 cm.
LocationBrazil ▹ Minais Gerais. Near Ipa.
PhotographerShannon Heinle. 2001-11-28.
CollectionUniversity of North Dakota Mineralogy Collection #1531.
Key wordscookeite, silicate
Tech details413 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1855