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Monday, February 22, 2010

Chrysoprase + Prase Opal, Haneti, Central Tanzania

James E. Shigley/Brendan M. Laurs/Nathan D. Renfro (GIA) has written a brilliant piece on chrysoprase and green prase opal (nickel-bearing chalcedony and common opal) recovered from altered serpentinite deposits near Haneti, Tanzania. Check it out.

Useful link:
www.gia.edu

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