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Prehnite with Graphite rod
Prehnite with Graphite rod Prehnite with Graphite rod Prehnite with Graphite rod Prehnite with Graphite rod
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Prehnite with Graphite rod (Ref: R899)

Merelani Hills, Arusha, Tanzania
53mm x 50mm x 27mm
$400
Glassy, translucent Prehnite crystals in a hemispherical formation. Beautiful crystals of yellow color. This started as a relatively smooth, round cluster that can still be seen in areas, with larger toothy crystals to 2cm grown out from the earlier cluster. There is also an unusual rod-like formation of Graphite that extends all the way through the cluster, which I've never seen before. Ex. Mike Keim collection. I have bought hundreds of these over the years, this was one of my keepers.
Data last checked on 1st Apr 2026 - specimen may no longer be available

From: Marin Minerals
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See Also

Prehnite
Merelani Hills, Arusha, Tanzania
$400
43mm x 35mm x 23mm
From: Marin Minerals
Chabazite on Prehnite with Tanzanite
Merelani Hills, Arusha, Tanzania
$400
54mm x 42mm x 34mm
From: Marin Minerals
Sphalerite with Graphite, Calcite
Merelani Hills, Arusha, Tanzania
$380
36mm x 20mm x 17mm
From: Marin Minerals
Diopside on Graphite
Merelani Hills, Arusha, Tanzania
$350
37mm x 25mm x 18mm
From: Marin Minerals
Prehnite
Merelani Hills, Arusha, Tanzania
$350
36mm x 30mm x 30mm
From: Marin Minerals
Chabazite on Prehnite on Tanzanite
Merelani Hills, Arusha, Tanzania
$450
30mm x 20mm x 20mm
From: Marin Minerals
Prehnite ps. Calcite
Merelani Hills, Arusha, Tanzania
$450
40mm x 25mm x 20mm
From: Marin Minerals
Diopside on Graphite
Karo Pit, Merelani Hills, Arusha, Tanzania
$450
35mm x 25mm x 15mm
From: Marin Minerals
Tsavorite on Graphite
Merelani Hills, Arusha, Tanzania
$500
23mm x 23mm x 20mm
From: Marin Minerals
Prehnite
Merelani Hills, Arusha, Tanzania
$300
36mm x 30mm x 21mm
From: Marin Minerals
Prehnite
Merelani Hills, Arusha, Tanzania
$300
40mm x 30mm x 28mm
From: Marin Minerals
Prehnite
Merelani Hills, Arusha, Tanzania
$300
40mm x 25mm x 15mm
From: Marin Minerals
Prehnite
Merelani HIlls, Arusha, Tanzania
$280
60mm x 45mm x 30mm
From: Marin Minerals
Prehnite
Merelani Hills, Arusha, Tanzania
$280
30mm x 25mm x 18mm
From: Marin Minerals
Chabazite on Prehnite
Merelani Hills, Arusha, Tanzania
$275
33mm x 25mm x 20mm
From: Marin Minerals
* price is an approximate conversion and may not be accurate.

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