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Keokuk Geode Lit

Picture of Keokuk Geode

Name:

Koekuk Geode

Other Name:

Keokuk Geode Lit

Pronunciation:

kee-uh-kuhk jee-ohd

Type:

Sedimentary

Classification:

Siliceous Geode

Luster:

Various

Chemical Formulation:

Shell - SiO2, Inside - SiO2, CaCO3, Al2Si2O5(OH)4, CaMg(CO3)2, FeS2

Fluorescent:

Some

Mohs Hardness:

3 - 7

Color:

Outside - gray-brown, Inside - Clear, Milky-white, gray, blue, orange, yellow, black

Fracture/Cleavage:

Typically Conchoidal

Uses:

Decorative display,  jewelry making

Key Features:

Hard Chalcedony shells and mineral rich interiors

Sources:

RocknGem, Fossilera

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