Todorokite Opal Image

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

Hudson Institute of Mineralogy

Opal, Todorokite

Large Opal Image

Mineral:

Opal: SiO2·n(H2O)
Todorokite: (Na,Ca,K)2(Mn++++,Mn+++)6O12·3-4.5(H2O)

Comments:

Dendritic todorokite in white opal.

Location:

Brosso Mine, Ivrea, Torino, Piemonte, Italy.

Scale:

See Photo.

Copyright:

© Jeff Weissman / Photographic Guide to Mineral Species

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