Manganese specimens

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Calcite with Manganese Inclusions

Jinhua, Zhejiang Prov., China

$6000

50mm x 30mm x 20mm

From: The Arkenstone

Manganese Biominerals (Todorokite, Romanechite, Birnessite)

Chesapeake Bay, Calvert County, Maryland, USA

$950

80mm x 80mm x 60mm

From: The Arkenstone

Manganese Biominerals (Todorokite, Romanechite, Birnessite)

Chesapeake Bay, Calvert County, Maryland, USA

$900

50mm x 40mm x 40mm

From: The Arkenstone

Manganese Biominerals (Todorokite, Romanechite, Birnessite) Ps. After Arthropod Burrows

Chesapeake Bay, Calvert County, Maryland, USA

$750

60mm x 60mm x 30mm

From: The Arkenstone

Manganese Biominerals (Todorokite, Romanechite, Birnessite)

Chesapeake Bay, Calvert County, Maryland, USA

$350

60mm x 40mm x 20mm

From: The Arkenstone

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

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* price is an approximate conversion and may not be accurate.

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