Important Natural History Auction 2017-07-30
This lot is closed for bidding. Bidding ended on 7/29/2017
SEPTERIAN ROUNDEL
Upper Jurassic
Ulyanovsk and Saratov region, Volga River, Russia
Formed from ancient dried mud in the final few million years of the Cretaceous, the dramatic characteristic of septaria is the natural fissure filling of vivid honey calcite and warm brown aragonite, in an eye-catching arrangement here on the double-sided and polished circular slab, 35 inches in diameter.
$15,000 - 20,000\n