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Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Manganese Biominerals (Todorokite, Romanechite, Birnessite)
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Manganese Biominerals (Todorokite, Romanechite, Birnessite) (Ref: CHESA-18)

Chesapeake Bay, Calvert County, Maryland, USA
60mm x 40mm x 20mm
minID: AP1-2LA
$350
This is a Manganese Biominerals (Todorokite, Romanechite, Birnessite) from Chesapeake Bay, Calvert County, Maryland, USA. 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.
Data last checked on 19th Aug 2025
From: The Arkenstone
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See Also

Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Chesapeake Bay, Calvert County, Maryland, USA
$400
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From: The Arkenstone
Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Chesapeake Bay, Calvert County, Maryland, USA
$1250
110mm x 30mm x 30mm
From: The Arkenstone
Manganese Dendrites. 1168.50 ct.
Solnhofen, Middle Franconia, Germany
$206 *
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$206 *
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Quartz var. Smoky and Amethyst
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Calcite
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$350
47mm x 46mm x 21mm
From: Bob Griffis Minerals
ILvaite
Laxey Mine | South Mountain Mining District | Owyhee County | Idaho | USA
$374 *
46mm x 37mm x 26mm
From: Wendel Minerals
Levyne, Offretite
Beech Creek, Grant County, Oregon, USA
$350
80mm x 55mm x 40mm
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Quartz scepter
Petersen Mountain Quartz Mines, Hallelujah Junction area, Washoe County, Nevada, USA
$350
90mm x 55mm x 45mm
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Fluorite with Cerussite, Calcite and Wulfenite
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$365
77mm x 65mm x 68mm
From: Bob Griffis Minerals
* price is an approximate conversion and may not be accurate.

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