Round crack? reflections? incredible impurity piece?

By Colin Jung; posted May 10, 2012

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Is there an incredible insulator hidden in this bad eBay auction photo? The insulator has been shipped to me but I won't know for a week+, given my schedule, what exactly I have here. Was afraid to ask a question of the seller, too afraid to bid on it and attract more attention to the piece. Rolled the dice on this piece, but didn't want to put a lot of money down. What do you think?

ans: This is a circular crack in the dome. Transport of darker minerals to the edge of the crack caused the ring effect. The center has a lot of the typical white mineralization, but it doesn't show well in this bad photo.

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