UNIQUE AUSTRALIAN GEMS

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    About US

    Costello’s is an Australian jewellery retailer specialising in the unique gems of Australia – the world’s finest and some say the best.

    The brilliance of the opal from the dreamtime outback, the elegance of the Argyle Diamond from Western Australia’s Kimberley ranges, and the romance of the South Sea Pearl from the waters around Broome.

    Read the story behind Costello's

    What We Make

    ONLY THE FINEST

    The brilliance of the opal from the dreamtime outback, the elegance of the Argyle Diamonds from Western Australia’s Kimberley ranges, and the romance of the South Sea Pearl from the waters around Broome.

    Opal

    Opals set apart from other gemstones because of its characteristic appearance and vibrant colours.

    DIAMONDS

    Diamonds are the hardest, the most imperishable, and the most brilliant of all precious stones.

    PEARLS

    South Sea Pearls are often referred to as the Rolls Royce of pearls.

    Our Latest Jewellery

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    14K W/G Light Opal Pendant 5.56cts

    14K W/G Light Opal Pendant 5.56cts

    $1,900
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    18K White & Rose Gold Pink & White Diamond Ring 105RD=1.36cts /35RD=0.79cts

    18K White & Rose Gold Pink & White Diamond Ring 105RD=1.36cts /35RD=0.79cts

    POA
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    18K W/G Argyle White Diamond Ring G/VS2 1RD=0.35cts G/SI 2RD=0.32cts

    18K W/G Argyle White Diamond Ring G/VS2 1RD=0.35cts G/SI 2RD=0.32cts

    $5,950
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    Platinum Black Opal & Diamond Ring 1.05cts 0.30cts

    Platinum Black Opal & Diamond Ring 1.05cts 0.30cts

    $3,750
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    18K W/G Pink & White Diamond Pendant 5P SI 1RD=0.06cts H SI 6RD= 0.21cts

    18K W/G Pink & White Diamond Pendant 5P SI 1RD=0.06cts H SI 6RD= 0.21cts

    POA
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    Gold,White & Black South Sea Pearl Strand 7-10mm 47pcs + S/S R/P Clasp

    Gold,White & Black South Sea Pearl Strand 7-10mm 47pcs + S/S R/P Clasp

    $1,890
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    18K Y/G Boulder Opal Pendant 70.00cts

    18K Y/G Boulder Opal Pendant 70.00cts

    $9,900
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    Platinum & 18K Y/G Boulder Opal & Diamond Ring 15.83cts

    Platinum & 18K Y/G Boulder Opal & Diamond Ring 15.83cts

    $6,600
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    Platinum Boulder Opal Ring 14.35cts

    Platinum Boulder Opal Ring 14.35cts

    $6,990
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    Platinum Boulder Opal & Diamond Ring 7.96cts 0.34cts

    Platinum Boulder Opal & Diamond Ring 7.96cts 0.34cts

    $5,950
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    18K W/G Boulder Opal Ring 7.51cts

    18K W/G Boulder Opal Ring 7.51cts

    $3,960
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    14K Y/G Light Opal & Diamond Ring 1.18cts 0.04cts

    14K Y/G Light Opal & Diamond Ring 1.18cts 0.04cts

    $2,100
    ONLY THE FINEST

    Colors of Australia

    Exclusive COllection

    Custom Made Diamond Jewellery by COSTELLO'S
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