Manganese Biominerals (Todorokite, Romanechite, Birnessite)

Chesapeake Bay, Calvert County, Maryland, USA
Small Cabinet, 8.5 x 7.0 x 3.5 cm
Start Time: 05/14/2020 7:30:00 pm (CDT)
End Time: 05/21/2020 6:35:00 pm (CDT)
Auction Closed
Winning Bid: $197

Item Description

Chesapeake biominerals, including Hollandite, Todorokite, Romanechite, Birnessite, and other unusual manganese and iron species, form when metal-rich subsurface waters emerge from the face of the cliffs along the western shore of Chesapeake Bay. Microbes exploit the chemical richness of the waters by oxidizing the metals and precipitating minerals in beautifully sculpted masses. The resulting specimens containing mixed amounts of these related species, such as those you see here, are among the finest examples of their style anywhere in the world and are unique in their aesthetic appeal and scientific interest. Highly unusua, scientifically interesting material that also happens to be pretty....for an odd combination of "rust minerals."

Did You Know We Offer Custom Bases?

Learn More

Bidding History

Bid Amount Bid Time
$197 05/21/2020 6:26:32 pm (CDT)
$187 05/21/2020 6:26:32 pm (CDT)
$165 05/21/2020 6:23:03 pm (CDT)
$155 05/21/2020 6:23:02 pm (CDT)
$133 05/21/2020 6:15:45 pm (CDT)
$123 05/21/2020 6:15:45 pm (CDT)
$98 05/21/2020 3:21:20 pm (CDT)
$88 05/21/2020 3:21:20 pm (CDT)
$88 05/21/2020 3:21:00 pm (CDT)
$87 05/21/2020 3:20:59 pm (CDT)
$61 05/21/2020 3:01:10 pm (CDT)
$51 05/20/2020 9:54:22 pm (CDT)
$50 05/20/2020 9:54:21 pm (CDT)
$45 05/20/2020 9:53:42 pm (CDT)
$40 05/20/2020 9:53:41 pm (CDT)
$30 05/20/2020 9:49:57 pm (CDT)
$25 05/17/2020 6:53:17 am (CDT)
$22 05/17/2020 6:53:17 am (CDT)
$10 05/16/2020 9:53:57 pm (CDT)