• 11.0CTS BOULDER OPAL KOROIT YOWAH AUSTRALIAN NATURAL SOLID POLISHED

    For sale I have a Koroit matrix opal from Queensland, Australia. This opal is 18.6mm x 10.3mm x 5.4mm and weighs 11.0cts.
    AU $25.00
  • Queensland Boulder Opal 5.30ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with a Multi colour Orange blue red flashes and swirl an undulating cut with some ironstone. Black Opal refers to the underlying colour – the colour of the opal when you turn it over.
    AU $150.00
    Free postage
    14 watching
  • Queensland Boulder Opal 11.15ct Australian Natural Stone

    Free form shape has solid colour and flashes of bright blue across the stone with some ironstone and marks in the face the opal has very fine cracks in the surface of the stone. Black Opal refers to the underlying colour – the colour of the opal when you turn it over.
    AU $75.00
    Free postage
  • AUSTRALIAN BOULDER OPAL SOLID STONE NATURAL GEM CUT 4.00ct

    We, at Absolute Opals and Gems Pty Ltd, (Australia) are second generation Gem-Stone Miners, Cutters and Wholesalers, proudly specialising in Australian Black Opal straight from the mines to us. You will find us located in the heart of the busy mining town of Lightning Ridge, New South Wales, approx.
    AU $255.00
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    FAST 'N FREE
    11 watching
  • Queensland Boulder Opal 35.11ct Loose Australian Natural Stone

    A free form square shape Queensland boulder opal split pair of earring stones with very bright overall multi colour Blue Green Orange Red Gold gem bright flashes and very small ironstone in the surface the pair are natural polished splits showing split undulations.
    AU $2,850.00
    or Best Offer
    FAST 'N FREE
  • Queensland Boulder Opal 10.62ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with Blue Green flash across the stone with a purple hue in undulating stone some ironstone in colour very small crack in the base of colour. Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $250.00
    Free postage
    or Best Offer
    11 watching
  • Boulder opal australian rough natural koroit yowah 435 Carats

    Natural rough boulder opal specimen. Australian boulder opal. Weight 435 Carats. Item pictured is the item for sale.
    AU $12.00
  • Queensland Boulder Opal 1.21ct Loose Australian Natural Stone

    Black Opal refers to the underlying colour – the colour of the opal when you turn it over. The darker the body the more valuable to stone may be. It is this darkness that lends brightness to the other colours displayed with in the stone.
    AU $75.00
    Free postage
  • Queensland Boulder Opal 1.95ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with bright Green flash across the stone. Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $75.00
    Free postage
    10 watching
  • Queensland Boulder Opal 8.15ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with bright Green blue colour with an almost overall gem green blue flash. Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $750.00
    Free postage
    or Best Offer
  • 49.50 CTS BOULDER OPAL KOROIT YOWAH AUSTRALIAN NATURAL SOLID POLISHED

    Answer:The answer, put simply, is the diffraction of light. Much like a prism, which can refract white light and produce a rainbow effect, opals diffract the white light which is coming from above, displaying those amazing opal colours.
    AU $162.00
    Free postage
    or Best Offer
  • 18 ct natural solid Queensland boulder matrix opal from Australia by Opal First!

    SOLID, NATURAL GENUINE BOULDER MATRIX OPAL FROM QUEENSLAND, AUSTRALIA …. STONE TYPE : SOLID, NATURAL BOULDER MATRIX OPAL. Opal First ! ”. Solid natural, genuine Australian opals from Australia, NOT synthetic, not a doublet or triplet.
    AU $78.00
    Free postage
    or Best Offer
  • Queensland Boulder Opal 9.89ct Loose Australian Natural Stone

    Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $75.00
    Free postage
  • Queensland Boulder Opal 0.92ct Loose Australian Natural Stone

    AUSTRALIAN OPAL SPECIALIST. Boulder Opal. Black Opal refers to the underlying colour – the colour of the opal when you turn it over. The darker the body the more valuable to stone may be. It is this darkness that lends brightness to the other colours displayed with in the stone.
    AU $95.00
    Free postage
  • Queensland Boulder Opal 2.69ct Loose Australian Natural Stone

    Black Opal refers to the underlying colour – the colour of the opal when you turn it over. The darker the body the more valuable to stone may be. It is this darkness that lends brightness to the other colours displayed with in the stone.
    AU $225.00
    Free postage
  • Queensland Boulder Opal 12.39ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with an overall green pink swirls of colour in undulating stone with some spots of ironstone in colour. Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $325.00
    Free postage
  • Queensland Boulder Opal 15.22ct Loose Australian Natural Stone

    A free form Triangle shape Queensland boulder opal stone with light Green blue colour overall gem with light green flashes Opal has hair line stabilized fracture in stone. Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $350.00
    Free postage
    or Best Offer
  • Boulder opal australian rough natural koroit yowah 148 Carats

    Natural rough boulder opal specimen. Australian boulder opal. Weight 148 Carats.
    AU $12.00
    or Best Offer
  • Queensland Boulder Opal 9.99ct Australian Natural Stone

    Free form drop shape A very bright Picture stone with main section of Green Blue down the centre and side of the stone and two crescents bands of multi colour orange yellow and green with the main blue green flowing though the gap like tide the opal has an undulating carved face of the stone.
    AU $620.00
    Free postage
    or Best Offer
  • 13 ct natural solid Queensland boulder matrix opal from Australia by Opal First!

    SOLID, NATURAL GENUINE BOULDER MATRIX OPAL FROM QUEENSLAND, AUSTRALIA …. STONE TYPE : SOLID, NATURAL BOULDER MATRIX OPAL. Opal First ! ”. DIMENSIONS : 18 x 10 x 5, 13 x 12 x 5 mm. Solid natural, genuine Australian opals from Australia, NOT synthetic, not a doublet or triplet.
    AU $40.00
    Free postage
    or Best Offer
  • Queensland Boulder Opal 5.47ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with a Multi colour Orange blue green flashes in bars of colour separated by potch on an undulating cut on native ironstone. Black Opal refers to the underlying colour – the colour of the opal when you turn it over.
    AU $65.00
    Free postage
  • Queensland Boulder Opal 6.50ct Australian Natural Stone

    A free form Queensland Boulder opal with very bright Blue Green multi colour flashes in Small flash and pinfire swirls small ironstone spot on one side otherwise clean gem colour. Black Opal refers to the underlying colour – the colour of the opal when you turn it over.
    AU $1,750.00
    or Best Offer
    FAST 'N FREE
  • Queensland Boulder Opal 1.56ct Australian Natural Stone

    Black Opal refers to the underlying colour – the colour of the opal when you turn it over. The darker the body the more valuable to stone may be. It is this darkness that lends brightness to the other colours displayed with in the stone.
    AU $70.00
    Free postage
  • Queensland Boulder Opal 22.90ct Loose Australian Natural Stone

    Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $295.00
    Free postage
    or Best Offer
  • Queensland Boulder Opal 7.43ct Loose Australian Natural Stone

    A free form shape Queensland boulder opal stone with a blue purple base colour bright flashes of multi colour red blue in the stone and some iron stone through to surface. Boulder opal is a type of opal that forms within the cavities of ironstone boulders dating from the time when central Queensland was cover by an inland sea The Opal is found in both vertical and horizontal cracks or seams.
    AU $85.00
    Free postage
    11 watching

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