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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-38)

Chesapeake Bay, Calvert County, Maryland, USA
80mm x 80mm x 60mm
minID: GR6-1GE
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.
From: The Arkenstone
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See Also

Manganese Biominerals (Todorokite, Romanechite, Birnessite)
Chesapeake Bay, Calvert County, Maryland, USA
$1250
110mm x 30mm x 30mm
From: The Arkenstone
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
$350
60mm x 40mm x 20mm
From: The Arkenstone
Todorokite
Chesapeake Bay, Calvert Co., Maryland, USA
$900
30mm x 20mm
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
Copper (spinel-twinned)
Wolverine Mine, Kearsarge Lode, Houghton County, Michigan, USA
$950
70mm x 10mm x 10mm
From: The Arkenstone
Vanadinite
Pachecho Claims, Yuma County, Arizona, USA
$950
10mm x 10mm x 10mm
From: The Arkenstone
Wulfenite
Schultz Claim, Mammoth District, Tiger, Pinal County, Arizona, USA
$950
20mm x 10mm
From: The Arkenstone
Baryte
Bookcliffs, Grand Junction, Mesa County, Colorado, USA
$950
20mm x 10mm
From: The Arkenstone
Sylvite with Halite
Kerr McGee Mine, Carlsbad Potash District, Eddy County, New Mexico, USA
$950
30mm x 20mm x 20mm
From: The Arkenstone
Wulfenite
Red Cloud Mine, La Paz County, Arizona, USA
$900
20mm x 20mm
From: The Arkenstone
Chrysocolla covered with Quartz
Ray Mine, Ray District, near Kearney, Dripping Springs Mts., Pinal County, Arizona, USA
$875
130mm x 122mm x 61mm
From: Bob Griffis Minerals
Galena on Sphalerite, with Ankerite, Pyrite, and Chalcopyrite
Eagle Mine, Gilman District, Eagle County, Colorado, USA
$850
195mm x 148mm x 72mm
From: Bob Griffis Minerals
Neptunite
California State Gem Mine, New Idria Mining District, San Benito Co., California, USA
$950
20mm x 10mm x 10mm
From: The Arkenstone
* price is an approximate conversion and may not be accurate.

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