Prehnite
Prehniet, Prehnit, Prehnita, Пренит, 葡萄石, ぶどう石
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula:
Ca2Al2[(OH)2/Si3O10]
Mineral class: silicates Crystal system: rhombic Mohs scale: 6 - 6.5 Density (g/cm3): 2.87 - 2.93 Refractive index: 1.611 - 1.669 Cleavage: different Colors: colorless, yellow, orange, green Luster: vitreous Fluorescence: - Pleochroism: green - tan Largest Prehnite: 4.5 cm? Deposits: Australia, Namibia, China, Scotland, South Africa, USA Discovery: 1783 ? 1st Description: 1892 Name: in honor of the Dutch Colonel Hendrik von Prehn (1733 - 1785) who brought the mineral in 1783 from South Africa to Europe |
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Prehnite Mineral
Size: 3.6 x 2.6 x 1 cm Origin: O & G Quarry / Southbury / Connecticut / USA Photo by kind permission of © www.kqminerals.com |
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Prehnite Mineral
Size: 1.8 x 0.5 x 0.5 cm Origin: Jeffrey Quarry / Asbestos / Québec / Canada Photo by kind permission of © www.irocks.com |
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Prehnite Mineral
Origin: Upper New St. / Patterson / New Jersey / USA Photo by kind permission of © www.irocks.com |
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Prehnite Mineral
Size: 6.0 x 4.6 x 3.9 cm Origin: Mali Photo by kind permission of © www.online-edelstein.de |
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Prehnite Mineral
Size: 3.6 x 3.0 x 2.5 cm Origin: Sandare Distr. / Kayes Reg. / Mali Photo by kind permission of © www.irocks.com |
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Prehnite
Weight: 13.37 ct Origin: Prospect Park Quarry / New Jersey / USA Photo by kind permission of www.minclassics.com |
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Prehnite Mineral
Origin: Bendoukou / Sandare Distr. / Kayes Reg. / Mali Photo by kind permission of © www.treasuremountainmining.com |
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Prehnite Mineral
Size: 1.5 x 0.5 x 0.5 cm Origin: Jeffrey Mine / Asbestos / Québec / Canada Photo by kind permission of © www.lucianabarbosa.com |
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Prehnite Mineral
Size: 8.5 x 4.3 x 4.3 cm Origin: Lane Quarry / West Springfield / Massachusetts / USA Photo by kind permission of © www.irocks.com |
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Prehnite Sculpture
Size: 4.7 x 2.85 x 1.45 cm Photo by kind permission of © www.wagner-edelsteine.de |
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Prehnite Mineral
Origin: Brandberg Distr. / Erongo Region / Namibia Photo by kind permission of © www.irocks.com |
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Prehnite color change
Size: 1.51 x 1.13 cm Weight: 13.19 ct Origin: Kayes Reg. / Mali Photo by kind permission of www.americanthai.com |
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Prehnite Mineral
Origin: Brandberg Distr. / Erongo Region / Namibia Photo by kind permission of © www.exceptionalminerals.com |
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Prehnite
Size: 1.53 x 1.53 cm Weight: 14.65 ct Origin: Mali Photo by kind permission of www.irocks.com |
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Prehnite Mineral
Size: 4.2 x 3.3 x 1.9 cm Origin: Umba Valley / Arusha / Simanjiro Distr. /Tanzania Photo by kind permission of © www.online-edelstein.de |
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Prehnite
Size: 2.28 x 1.36 cm Weight: 25.11 ct Origin: Australia Photo by kind permission of www.thegemtrader.com |
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Prehnite Mineral
Size: 1.7 x 1.5 x 1.3 cm Origin: Umba Valley / Arusha / Simanjiro Distr. /Tanzania Photo by kind permission of © www.kqminerals.com |
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Prehnite
Size: 1.65 x 1.03 cm Weight: 10.52 ct Origin: Australia Photo by kind permission of www.rarestone.com |
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Prehnite
Weight: 1.02 ct Origin: Prospect Quarry / New South Wales / Australia Photo by kind permission of www.gemfrance.com |
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Prehnite Mineral
Origin: Scotland / Great Britain Photo by kind permission of © www.treasuremountainmining.com |
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Prehnite
Size: 1.26 x 0.90 cm Weight: 3.29 ct Origin: Australia Photo by kind permission of www.ke4gems.com |
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Prehnite Mineral
Size: 3.4 x 1.8 x 1.4 cm Origin: N'Chwaning Mines / Hotazel / Northern Cape Prov. / South Africa Photo by kind permission of © www.irocks.com |
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Prehnite Mineral
Size: 7 x 6.9 x 3.4 cm Origin: Jeffrey Mine / Asbestos / Québec / Canada Photo by kind permission of © www.irocks.com |
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Prehnite Mineral
Origin: Brandberg Distr. / Erongo Region / Namibia Photo by kind permission of © www.irocks.com |
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Prehnite
Size: 2.2 x 1.5 x 1.2 cm Weight: 20.80 ct Origin: Mali Photo by kind permission of www.kox-gems.com |
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Prehnite Mineral
Size: 9.6 x 8.8 x 4.2 cm Origin: Prospect Park Quarry / Prospect Park / Passaic County / New Jersey / USA Photo by kind permission of © www.irocks.com |
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Prehnite Earrings
Prehnites: 12.52 ct Diamonds: total 0.34 ct Gold: 18K White Gold Photo by kind permission of www.collectorfinejewelry.com |
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Prehnite Mineral
Size: 18 x 13 cm Origin: Mumbai / India Photo by kind permission of © www.douglassminerals.com |
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