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Datolite (color change) and Heulandite
Datolite (color change) and Heulandite Datolite (color change) and Heulandite Datolite (color change) and Heulandite
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Datolite (color change) and Heulandite (Ref: 8.1-208)

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, United States
51mm x 32mm x 28mm
minID: 02F-TGN
Datolite with a strong color change from artificial to daylight, the color goes from a dark olive-green to a yellow-grey. From a remarkable pocket at the classic Prospect Park Quarry locality in 2008, there were not many pieces found. This has contrasting Huelandites with a warm brown color and shows the uncommon color change phenomenon very well. The Datolite is transparent with many faces being very glassy. There is contacting and bruising that can be hidden fairly well by display angle, so not for perfectionists. Overall the condition is equal to the best I have seen from this find, and a cute Northeastern USA oddity.
From: Well-Arranged Molecules
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See Also

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$350
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$220
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Datolite with Calcite
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$285
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Chabazite on Heulandite
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Mesolite with Heulandite, Fluorapophyllite-K
Vikarnes Quarry, Haldorsvik, Streymoy, Faroe Islands
$160
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Mesolite with Heulandite, Celadonite
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$135
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From: Weinrich Minerals
Green APOPHYLLITE and HEULANDITE on STILBITE - India
$270
From: SZ Mineraux
HEULANDITE and STILBITE on CHALCEDONY - India
$225
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Heulandite
Ciamol Alp, Fassa Valley, Trento Province, Trentino-Alto Adige Region, Italy
$275
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From: Bob Griffis Minerals
Datolite
Bor Pit, Dal'negorsk, Primorskiy Kray, Russia
$295
55mm x 40mm x 25mm
From: Weinrich Minerals
Heulandite
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$300
60mm x 50mm x 40mm
From: Marin Minerals
Pyrochroite with Datolite
N'Chwaning II Mine, Northern Cape, South Africa
$300
60mm x 55mm x 30mm
From: Weinrich Minerals
Prehnite “BOOT”-shaped cast after Anhydrite with Calcite
Prospect Park Quarry (Sowerbutt Quarry; Vandermade Quarry; Warren Brothers Quarry), Prospect Park, Passaic County, New Jersey
$222
28mm x 27mm x 16mm
From: Mineral Classics
Datolite with Quartz
Bor Pit, Dal'negorsk, Primorskiy Kray, Far-Eastern Region, Russia
$181 *
55mm x 70mm x 52mm
From: Taranis Minerals
Heulandite with Mordenite, Calcite
Amudika River, near Mirny, Yakutia, Siberia, Russia
$150
35mm x 30mm x 20mm
From: Marin Minerals
* price is an approximate conversion and may not be accurate.

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