Opal
Opaal, Opaali, Opál, Opala, Opalas, Opale, Ópalo, Đá opal, العقيق, オパール, Опал, 蛋白石, אופאל
Opaal, Opaali, Opál, Opala, Opalas, Opale, Ópalo, Đá opal, العقيق, オパール, Опал, 蛋白石, אופאל
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
Links:
Excellent photos and informations about precious opals at www.oztrailia.de/opale.html
South Australian opal museums at www.flindersoutback.com
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Formula: SiO2·n H2O
Mineral Class: Oxides Crystal System: amorph Mohs Scale: 5.5 - 6 Density (g/cm3): 1.9 - 2.3 Colors: Typical opalescence (up to all colors) on a base of usually one color. Fluorescence: blue, green Pleochroism: - Largest Opal: “Olympic Australis”, mined in 1956 in the "Eight Mile" opal field in Coober Pedy, South Australia. This largest and most valuable ever being found precious opal weights 3.45 kg (= 17,000 ct), and measures 280 mm x 120 mm x 115 mm. It can be viewed at Altmann & Cherny's, 128 Exhibition Street, Melbourne, Australia. (Source: www.altmanncherny.com.au/olympic.htm) Deposits: worldwide |
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Ethiopian Opal Mineral
Origin: Ethiopia Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Ethiopian Crystal Opal
Weight: 37.67 ct Origin: Ethiopia Photo by kind permission of © www.ravenstein-germany.com, Ales Patrick Krivanek. |
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Ethiopian Fire Opal Mineral
Origin: Ethiopia Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Ethiopian Fire Opal
Weight: 1.15 ct Origin: Ethiopia Photo by kind permission of © www.djraregems.com, John & Donna Rhoads. |
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Australian Opal
Origin: Australia |
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Black Opal Mineral
Origin: Lightning Ridge / Finch County / New South Wales / Australia Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward. |
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Black Opal Ring 18K + Diamond
Weight of the Opal: 2.36 ct Origin of the Opals: Lightning Ridge / Finch County / New South Wales / Australia Photo by kind permission of © www.opalsdownunder.com.au, Adrian Stein. |
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Black Opal Rolling Flash Pattern
Weight: 30.86 ct Origin: Lightning Ridge / Finch County / New South Wales / Australia Photo by kind permission of © www.opalsdownunder.com.au, Adrian Stein. |
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Semi-black Opal Broad Flash Pattern
Weight: 56.50 ct Origin: Mintabie / South Australia / Australia Photo by kind permission of © www.opalsdownunder.com.au, Adrian Stein. |
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White Opal
Weight: 18.95 ct Origin: Coober Pedy / South Australia / Australia Photo by kind permission of © opal-trader.com, Chris Kalogeras. |
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White Opal Ring 14K
Weight of the Opal: 1.62 ct Origin of the Opals: Coober Pedy / South Australia / Australia Photo by kind permission of © www.opalsdownunder.com.au, Adrian Stein. |
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Crystal Opal
Weight: 68.00 ct Origin: Mintabie / South Australia / Australia Photo by kind permission of © opal-trader.com, Chris Kalogeras. |
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Boulder Opal Mineral
Origin: Queensland / Australia Photo by kind permission of © skywalker.cochise.edu, Roger Weller. |
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Boulder Opal
Weight: 11.20 ct Origin: Winton / Queensland / Australia Photo by kind permission of © www.opalsdownunder.com.au, Adrian Stein. |
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Boulder Opal Ring 18K + Diamond
Weight of the Opal: 5.02 ct Origin of the Opal: Quilpie / Queensland / Australia Photo by kind permission of © www.opalsdownunder.com.au, Adrian Stein. |
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Opalized Shell
Origin: Andamooka / South Australia / Australia Photo by kind permission of © skywalker.cochise.edu, Roger Weller. |
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Mexican Opal
Origin: Mexico |
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Opal
Weight: 0.75 ct Origin: Mexico Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Opal "Contra Luz"
Weight: 1.84 ct Origin: Mexico Photo by kind permission of © www.thegemtrader.com, Brad Payne. |
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Opal
Weight: 1.14 ct Origin: Mexico Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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Fire Opal
Weight: 5.21 ct Origin: Mexico Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji. |
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Fire Opal
Weight: 4.11 ct Origin: Mexico Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Fire Opal Mineral
Origin: Mexico Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Fire Opal Mineral
Origin: Rodriguez Dam / Tijuana / Baja California / Mexico Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Fire Opal
Weight: 1.40 ct Origin: Mexico Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Fire Opal
Weight: 3.62 ct Origin: Mexico Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Fire Opal
Weight: 5.14 ct Origin: Mexico Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Fire Opal
Weight: 37.93 ct Origin: Mexico Photo by kind permission of © www.ridderborg.se, Simon Ridderborg. |
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Opal Mineral
Origin: Rodriguez Dam / Baja California / Mexico Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Opal (cuprian)
Weight: 2.76 ct Origin: Peru Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Opal (cuprian)
Weight: 0.79 ct Origin: Peru Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Opal (cuprian)
Weight: 1.09 ct Origin: Peru Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Opal (cuprian)
Weight: 0.84 ct Origin: Peru Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Opal
Weight: 13,64 ct Origin: Peru Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Opal with Dendrites
Weight: 42.33 ct Origin: India Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Opal Cat's Eye
Weight: 5.44 ct Origin: Brazil Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Opal Cat's Eye
Weight: 0.81 ct Origin: Brazil Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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Opal Star
Origin: Idaho / USA Photo by kind permission of © http://skywalker.cochise.edu, Roger Weller. |
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