minfind.com
Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Manganese Biominerals (Todorokite, Romanechite, Birnessite) Manganese Biominerals (Todorokite, Romanechite, Birnessite) Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Click photos to view larger versions.

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 6th Jun 2026
From: The Arkenstone
Buy now from The Arkenstone

To purchase this mineral you need to click the button above to transfer to the dealer's website. This will open in a new window. Price shown here does not include shipping costs, always confirm price on dealer website before ordering.

Please tell the dealer you found this mineral on minfind.com - help keep minfind.com alive again!

All photos for this item are copyright © The Arkenstone and may not be used for any other purpose without permission.

See Also

Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Chesapeake Bay, Calvert County, Maryland, USA
$400
70mm x 10mm x 10mm
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 *
From: A Bijoux
Manganese Dendrites. 377.40 ct.
Solnhofen, Middle Franconia, Germany
$206 *
From: A Bijoux
Quartz var. Smoky and Amethyst
Lincoln County, New Mexico, USA
$350
67mm x 20mm x 28mm
From: Enchanted Minerals
Quartz var. Smoky
Lincoln County, New Mexico, USA
$350
96mm x 29mm x 23mm
From: Enchanted Minerals
Quartz var. Smoky
Lincoln County, New Mexico, USA
$350
79mm x 59mm x 56mm
From: Enchanted Minerals
Quartz var. Smoky
Lincoln County, New Mexico, USA
$350
66mm x 54mm x 39mm
From: Enchanted Minerals
Calcite
Garfield County, Utah, USA
$350
94mm x 76mm x 64mm
From: Enchanted 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
From: Marin Minerals
Quartz scepter
Petersen Mountain Quartz Mines, Hallelujah Junction area, Washoe County, Nevada, USA
$350
90mm x 55mm x 45mm
From: Marin Minerals
Goethite COLORADO
Octopaz pocket, Lake George County, Colorado, USA
$350
43mm x 38mm x 17mm
From: Spirifer Minerals
Quartz ( var. Herkimer )
Ace of Diamonds Mine, Middleville, Town of Newport, Herkimer County, New York, USA
$345
80mm x 49mm x 37mm
From: Bob Griffis Minerals
Calcite
Sweetwater Mine, Reynolds County, Missouri, USA
$360
150mm x 105mm x 48mm
From: Spirifer Minerals
* price is an approximate conversion and may not be accurate.

Please note that all information shown on this site may be subject to change. Information and photos are taken automatically from dealer websites and because of this errors may creep in from time to time. If there is a difference shown in price, details or availability between this site and the dealer website, you should always assume the dealer website is correct. Some of these minerals may no longer be available as our indexing of dealer websites is not real-time.

If you want to have your mineral website listed on minfind.com, click here to find out how.

Website copyright © J.Ralph and minfind.com 2009-2026. All photographs and mineral descriptions remain copyright of the mineral dealers. All Rights Reserved.