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Categories Gemstones Cabochon   Albite   Amazonite   Amber   Amethyst   Ammolite   Apatite   Aragonite   Aventurine   Chalcedony   Chrysoberyl   Chrysoprase   Citrine   Dinosaur   Diopside Star   Emerald   Fire Agate   Fossil   Hackmanite   Hematite   Hemimorphite   Iolite   Jasper   Kakortokite   Lapis Lazuli   Malachite   Mawsitsit   Moonstone   Nephrite   Obsidian   Opal   Pearl   Peridot   Prehnite   Pyrite   Rhodonite   Rose Quartz   Ruby   Sapphire   Scapolite   Seraphinite   Sillimanite   Smoky Quartz   Spinel   Sunstone   Tigers Eye   Tourmaline   Turquoise   Unakite Gemstones Facetted Gemstones Unique Gemstones Beads Gemstone Carvings Gemstones Crystals Jewellery Gold Jewellery Silver Jewellery Mineral Specials Sillimanite (Cats Eye) €6.40 €5.12   Mawsitsit €5.00 €4.00   Sunstone (Cats Eye) €24.95 €19.96   Aventurine €8.75 €7.00   Garnet €7.50 €6.00   Morganite €27.00 €21.60   Scapolite €8.00 €6.40   Chrysocolla €1.50 €1.20   Amethyst €25.00 €20.00   Opal  Hardness   5.5 - 6.5  Specific Gravity   2.09  Refractive Index   1.37 - 1.52  Crystal Structure   Amorphous  Chemical Composition   SiO2.nH2O Article-Nr.  ECOpa101  Price  €49.50  Gemstone  Opal (Cats Eye) Carat  4.19  Size  12 - 10 mm  Shape  Oval  Color  Milk & Honey  Clarity  Transparent  Origin  Australia  Treatment  -    Quantity  1    Article-Nr.  ECOpa105  Price  €10.00  Gemstone  Opal Carat  1.75  Size  11.5 - 7 - 2 mm  Shape  Free  Color  Blue  Clarity  Opaque  Origin  Australia  Treatment  Doublet    Quantity  1    Article-Nr.  ECOpa109  Price  €17.00  Gemstone  Opal Dendrite Carat  10.87  Size  19.4 - 13.6 - 7.4 mm  Shape  Free  Color  White & Black  Clarity  Opaque  Origin  Australia  Treatment  None    Quantity  1    Article-Nr.  ECOpa113  Price  €22.00  Gemstone  Fire Opal Carat  5.60  Size  12 - 10 - 7 mm  Shape  Oval  Color  Honey  Clarity  Translucent  Origin  Africa  Treatment  None    Quantity  1    Article-Nr.  EVOpa202  Price  €49.95  Gemstone  Opal Carat  5.84  Size  18 - 13 mm  Shape  Oval  Color  Rainbow  Clarity  Opaque  Origin  Australia  Treatment  -    Quantity  1    Article-Nr.  EVOpa204  Price  €45.00  Gemstone  Opal Carat  5.53  Size  18 - 13 mm  Shape  Oval  Color  Rainbow  Clarity  Opaque  Origin  Australia  Treatment  -    Quantity  1    Displaying 1 to 6 (of 6 products) Result Pages:  1