Todorokite Opal Image

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

Hudson Institute of Mineralogy

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.

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

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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