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ROCK TALK is the official publication and is © by the Tucson Gem and Mineral Society, Inc. to reproduce material contained herein for non-profit use only.  All other commercial and other use requires written permission from the Tucson Gem and Mineral Society, Inc.

ROCK TALK is the official publication and is © by the Tucson Gem and Mineral Society, Inc. to reproduce material contained herein for non-profit use only.  All other commercial and other use requires written permission from the Tucson Gem and Mineral Society, Inc.