Todorokite Opal Image

Hudson Institute of Mineralogy

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

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

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.

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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