Rectangle Cushion

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  • The "Everly" Three-Stone Ring in Platinum 950 with a 1.83-Carat Peacock Blue Montana Sapphire (Heated), a large square-cut blue gemstone flanked by two triangular clear stones on each side, displayed on a green and gray striped surface.The "Everly" Three-Stone Ring in Platinum 950 with a 1.83-Carat Peacock Blue Montana Sapphire (Heated)—is displayed upright on a textured surface, with “EARTH’S TREASURY” and a geometric logo at the bottom.

    The “Everly” Three-Stone Ring

    $3,100.00

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  • A gold “Althea” ring with an oval blue gemstone center, accented by four marquise diamonds and four small blue stones, displayed on a green stem.Althea gold ring featuring a dark center stone secured by four prongs and flanked by two side stones, showcased upright on a blue textured rock. “Earth’s Treasury” logo appears at the bottom.

    The “Althea” Ring

    $2,600.00

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  • A 1.74-carat peacock blue-teal particolored Montana sapphire (heated), expertly faceted in a rectangular shape, rests on a textured gray surface with the “Earth’s Treasury” logo and text displayed at the bottom.

    1.74-Carat Deep Blue-Teal Particolored Montana Sapphire (Heated)

    $3,900.00

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  • A 1.81-carat Montana sapphire (heated) with a radiant cut and starburst pattern is displayed on a textured gray surface above the words “Earth’s Treasury.”.

    1.81-Carat Blue-Aqua Particolored Montana Sapphire (Heated)

    $4,950.00

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  • A rectangular-cut 1.91-carat Montana sapphire (heated) in a vibrant teal hue is displayed on a textured gray surface with the text “EARTH’S TREASURY” beneath it.

    1.91-Carat Green-Teal Particolored Montana Sapphire (Heated)

    $2,800.00

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  • A 1.91-carat rich blue-teal particolored Montana sapphire (heated) with intricate facets is displayed on a textured surface, with the Earth's Treasury logo and text below.

    1.91-Carat Rich Blue-Teal Particolored Montana Sapphire (Heated)

    $5,250.00

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  • A rectangular, rich teal blue 1.99-carat Montana sapphire (heated) with faceted cuts rests on a textured, metallic surface featuring the "EARTH'S TREASURY" text and logo below.

    1.99-Carat Rich Teal Blue Montana Sapphire (Heated)

    $2,500.00

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  • A 2.57-carat aqua-blue particolored Montana sapphire (heated), featuring a rectangular cushion cut, rests on a textured surface with the “Earth’s Treasury” logo and text beneath it.

    2.57-Carat Aqua-Blue Particolored Montana Sapphire (Heated)

    $4,600.00

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  • The "Cara" ring featuring a round green gemstone and a twisted band adorned with small diamonds, displayed on a green striped surface with the Earth’s Treasury logo at the bottom.The "Cara" ring is displayed upright on a rough blue stone, featuring a decorative top with a patterned surface and the Earth’s Treasury logo beneath.

    The “Cara” Ring

    $2,350.00

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  • A 2.26-carat teal Madagascar sapphire, cut in a rectangular shape, is displayed on a textured surface with the “Earth’s Treasury” logo beneath it.

    2.26-Carat Teal Madagascar Sapphire (Unheated)

    $4,950.00

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  • A rectangular, faceted 2.56-carat teal Madagascar sapphire (heated) rests on a textured gray surface with the words “EARTH’S TREASURY” below.

    2.56-Carat Teal Madagascar Sapphire (Heated)

    $6,700.00

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  • 2.55-Carat Sky Blue Ceylon Sapphire (Heated)

    2.55-Carat Sky Blue Ceylon Sapphire (Heated)

    $6,600.00

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  • A 3.29-carat rich cornflower blue Ceylon sapphire, cut in a cushion shape with faceted surfaces, rests on a textured, light-colored background. The Earth’s Treasury logo appears at the bottom.

    3.29-Carat Rich Blue Ceylon Sapphire (Heated)

    $9,500.00

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  • A 3.55-carat colorless-blue particolored Ceylon sapphire with facets rests on a textured gray surface. The logo and text “Earth’s Treasury” appear at the bottom of the image.

    3.55-Carat Colorless-Blue Particolored Ceylon Sapphire (Unheated)

    $12,500.00

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  • A rectangular cushion-cut 3.21-carat rich teal Madagascar sapphire (heated) rests on a textured gray surface with the words “Earth’s Treasury” at the bottom.

    3.21-Carat Rich Teal Madagascar Sapphire (Heated)

    $7,900.00

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  • A 4.39-carat Royal Blue Ceylon sapphire (heated) with a cushion cut is displayed on a textured gray surface, with the words “Earth’s Treasury” at the bottom.

    4.39-Carat Royal Blue Ceylon Sapphire (Heated)

    $17,700.00

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  • A 1.35-carat rectangular, pale yellow Montana sapphire is shown on a textured gray surface with the Earth's Treasury logo at the bottom.

    1.35-Carat Light Peach-Yellow Opalescent Montana Sapphire

    $1,900.00

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  • A 1.38-carat heated Montana sapphire, cut in a cushion shape, is displayed on a textured surface with the "Earth's Treasury" logo beneath it.

    1.38-Carat Peacock Blue Montana Sapphire (Heated)

    $2,600.00

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  • The "Firenze" ring, expertly crafted in 18k yellow gold, features a 0.61-carat Montana sapphire center stone accented by two clear side stones. The ring is displayed on a rough blue-green mineral, with the "Earth's Treasury" text below.Presenting the "Firenze" ring in 18k yellow gold, showcasing a 0.61-carat Montana sapphire at its center and accented by two rectangular clear stones. Displayed elegantly atop a rough dark blue crystal, this striking piece is ready to ship.

    The “Firenze” Ring

    $4,950.00

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  • A faceted, oval-cut pale pink 2.24-Carat Ceylon Sapphire is displayed on a light textured surface with the Earth’s Treasury logo below.

    2.24-Carat Peach Ceylon Sapphire

    $4,600.00

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  • A 1.30-carat heated sapphire with a cushion cut is displayed on a textured metallic surface featuring the "Earth's Treasury" logo at the bottom.

    1.30-Carat Pink Ceylon Sapphire (Heated)

    $2,950.00

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  • The “Astrea” Ring with 1.48-Carat Cornflower Blue Ceylon Sapphire (Heated)The “Astrea” Ring with 1.48-Carat Cornflower Blue Ceylon Sapphire (Heated)

    The “Astrea” Ring

    $2,200.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • A cushion-cut pink gemstone, product JM-001-398JM-G, rests on a textured gray surface with the "Earth's Treasury" logo below.

    2.01-Carat Padparadscha Ceylon Sapphire

    $8,500.00

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  • The “Daphne” Solitaire with 3.03-Carat Near Black Australian Sapphire (Heated)The “Daphne” Solitaire with 3.03-Carat Near Black Australian Sapphire (Heated)

    The “Daphne” Solitaire with 3.03-Carat Near Black Australian Sapphire (Heated)

    $3,450.00

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Natural Gemstone Jewelry & Loose Gemstones at Earth’s Treasury

At Earth’s Treasury, we make finding your color easy with one of the widest selections of ethically sourced gemstones available, from Montana sapphires and garnets to tourmaline and emeralds. Our team of talented designers and jewelers is dedicated to creating custom gemstone jewelry that’s as unique as your story. Whether you’re drawn to classic pieces or dream up a one-of-a-kind engagement ring, we’ll guide you every step of the way to ensure your jewelry feels personal, original, and entirely you.