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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    18K W/G Cognac & White Diamond Ring 1.50cts

    18K W/G Cognac & White Diamond Ring 1.50cts

    $3,990
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    18K Y/G + Platinum Boulder Opal & Diamond Ring 6.30cts 0.05cts

    18K Y/G + Platinum Boulder Opal & Diamond Ring 6.30cts 0.05cts

    $3,500
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    18K Y/G Boulder Opal Pendant 15.50cts

    18K Y/G Boulder Opal Pendant 15.50cts

    $6,600
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    S/S R/P Gold & Black South Sea Pearl Necklace 13mm 5pcs

    S/S R/P Gold & Black South Sea Pearl Necklace 13mm 5pcs

    $1,490
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    14K Y/G Light Opal & Diamond Ring 4.45cts 0.06cts

    14K Y/G Light Opal & Diamond Ring 4.45cts 0.06cts

    $2,790
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    18K W/G Black Opal & Diamond Pendant 1.25cts 24RD=0.24cts

    18K W/G Black Opal & Diamond Pendant 1.25cts 24RD=0.24cts

    $3,600
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    14K Y/G Light Opal Ring 1.63cts

    14K Y/G Light Opal Ring 1.63cts

    $1,800
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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 Boulder Opal Ring 5.15cts

    14K Y/G Boulder Opal Ring 5.15cts

    $7,950
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    14K W&Y/G Light Opal & Diamond Earrings 1.34cts 6RD=0.26cts

    14K W&Y/G Light Opal & Diamond Earrings 1.34cts 6RD=0.26cts

    $2,960
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    Gold, White & Grey South Sea Pearl Strand 11-15mm + G/P Clasp

    Gold, White & Grey South Sea Pearl Strand 11-15mm + G/P Clasp

    $5,500
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    14K Y/G Light Opal & Diamond Pendant 1.51cts 0.02cts

    14K Y/G Light Opal & Diamond Pendant 1.51cts 0.02cts

    $1,880
    ONLY THE FINEST

    Colors of Australia

    Exclusive COllection

    Custom Made Diamond Jewellery by COSTELLO'S
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