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 Black Opal & Diamond Pendant 3.20cts 17RD=0.07cts

    14K W/G Black Opal & Diamond Pendant 3.20cts 17RD=0.07cts

    $2,790
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    Platinum Boulder Opal & Diamond Ring 2.15cts 0.18cts

    Platinum Boulder Opal & Diamond Ring 2.15cts 0.18cts

    $4,400
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    14K Y/G Boulder Opal Doublet Earring 2.16cts & Diamond Pendant 3.92 / 0.01cts Set

    14K Y/G Boulder Opal Doublet Earring 2.16cts & Diamond Pendant 3.92 / 0.01cts Set

    $2,800
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    14K Y/G Doublet Opal Earrings 2.20cts & Pendant 2.93cts Set

    14K Y/G Doublet Opal Earrings 2.20cts & Pendant 2.93cts Set

    $1,960
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    18K Y/G Light Opal Ring Opal 9.31cts

    18K Y/G Light Opal Ring Opal 9.31cts

    $5,900
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    18K Y/G Champagne & White Diamond Ring C4-C5 I1 4RD=0.86cts 22RD=0.56cts

    18K Y/G Champagne & White Diamond Ring C4-C5 I1 4RD=0.86cts 22RD=0.56cts

    $2,700
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    14K Y/G Doublet Opal Earrings 3.55cts & Pendant 7.49cts Set

    14K Y/G Doublet Opal Earrings 3.55cts & Pendant 7.49cts Set

    $2,185
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    18K Y/G Light Opal & Diamond Ring 2.33cts 6RD=0.11cts

    18K Y/G Light Opal & Diamond Ring 2.33cts 6RD=0.11cts

    $2,390
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    S/S R/P Doublet Opal Earrings & Pendant Set

    S/S R/P Doublet Opal Earrings & Pendant Set

    $2,500
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    18K Y&W/G Pink & White Diamond Ring 5P SI 1RD=0.425cts H SI 20RD=0.13cts

    18K Y&W/G Pink & White Diamond Ring 5P SI 1RD=0.425cts H SI 20RD=0.13cts

    POA
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    14K Y/G Doublet Opal Earrings & Diamond Pendant 2.40cts Set

    14K Y/G Doublet Opal Earrings & Diamond Pendant 2.40cts Set

    $2,900
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    14K Y/G Cognac Diamond Earrings C7 SI 2PD=0.32cts

    14K Y/G Cognac Diamond Earrings C7 SI 2PD=0.32cts

    $950
    ONLY THE FINEST

    Colors of Australia

    Exclusive COllection

    Custom Made Diamond Jewellery by COSTELLO'S
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