Types of Keokuk Geodes 

 

Definitions: What does that mean?

Barrel : cylindrical container, ex: battery

Botryoidal : shaped like a bunch of grapes, ex: smooth lava

Capillary : resembling a hair, ex: eyelash

Cubic : equal sided square, ex: pair of dice

Drusy :  wall lined with crystalline euhedra, ex: frozen dew on a leaf

Euhedral : composed of tiny crystals, without an exposed crystal face, ex: an onion skin

Ferroan : rich in iron, ex: rusty car fender

Filiform : hail-like, similar to capillary, but with multiple growth angles, ex: tree branch

Iridescent :  hue changes according to the angle from which the surface is viewed, ex: oil on the road after a rain

Pagoda : a tiered tower with multiple eaves, ex: Asian or Chinese hut

Reticulated : to form a net or network, ex: TV antenna on your roof

Rhombohedron (Rhomb) :   a square that has been deformed in only one direction, ex: partially squashed box

Scalenohedral : resembling the shape of a dog's tooth, ex: a dogs open mouth

 

  Picture with type below.

  type - 071

Solid Geode with exterior covered with Iron Pyrite

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Crystal Clear Selenite on Brown Calcite

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Sphalerite on Quartz

type - 081 

Iridescent Brown Calcite

type - 077

Pagoda Calcite  Close-Up #2

type - 079

Goethite on Quartz

type - 069

Smokey Quartz Snowball (Best one I've seen)

More Close-Ups: 2 - 3 - 4

Red Quartz

Red Quartz Geode


Pink Dogtooth

Pink Dogtooth Calcite


Phantom Calcites on Drusy Quartz 

Phantom Calcites on Drusy Quartz  Close-up #2


 

 Blue Barite Rosette on Botryoidal Chalcedony

Aragonite needles on Euhedral Chalcedony 

Chalcopyrite - s

Chalcopyrite on Quartz

Kaolinite after Calcite 

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 Marcasite (reticulated)

Yellow Barite - s

Yellow Barite on Quartz

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Malachite (small green crystals), Close-up #2

*The above photo/specimen is from the collection of Ken Vaisvil. Thank you.


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Capillary pyrite (very fragile) Close-up #2

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Barrel Calcite   

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Pink Calcite on chalcedony 

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Drusy Quartz

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Citrine Quartz

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Multi-chambered

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Smokey Diamond Dewdrop

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Oil Geode

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Diamond Dewdrop

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Quartz geode (simple, yet pretty)

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Really big geode, 90+ pounds

Pyrite - s

Pyrite cubes on quartz

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Ferroan Dolomite (ankerite) on quartz

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Kaolin or Kaoline (white powder)

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Infused capillary hematite (growing in and through the calcite crystals) similar phenomenon to rutilated quartz

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Onion skin, pale coating (euhedral chalcedony covering the quartz)

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Aragonite (fluorescent under short and long wave UV light) Sorry for the blurry close-up.

 

More coming soon . . . 

 Black Calcite (a.k.a "Kahoka Black" very rare, hunting in progress)