Rectangle Cushion

Showing 121–144 of 617 resultsSorted by latest

  • The "Senna" ring features a 2.20-carat round pink Umba sapphire set in 14k rose gold with a split diamond band, shown on a green striped leaf.The "Senna" ring in 14k rose gold, featuring a 2.20-carat rectangular Umba sapphire and small diamonds, is displayed upright on a rough gray stone with the Earth's Treasury logo below.

    The “Senna” Hidden Halo Ring

    $2,600.00

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  • The Cathedral "Begonia" ring in 14k yellow gold with a 2.27-carat Australian sapphire is displayed upright on a green leaf. The text "Earth's Treasury" appears at the bottom.The Cathedral "Begonia" ring in 14k yellow gold, featuring a 2.27-carat Australian sapphire, is displayed upright before a rough stone. The "EARTH'S TREASURY" logo appears at the bottom.

    The Cathedral “Begonia” Hidden Accent Solitaire

    $1,900.00

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  • The "Begonia" ring in 14K yellow gold, featuring a 1.56-carat Australian sapphire, is displayed upright on a green stem with the Earth's Treasury logo at the bottom center.The "Begonia" ring features a 1.56-carat Australian sapphire set in 14K yellow gold.

    The “Begonia” Hidden Accent Solitaire

    $1,900.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • A 2.28-carat Ceylon sapphire is set in the "Francoise" ring with white diamonds in 18k yellow gold, displayed on a green background. The "Earth's Treasury" logo appears at the bottom.The "Francoise" ring in 18k yellow gold with a 2.28-carat Ceylon sapphire stands upright on a blue-green raw gemstone, with "Earth's Treasury" branding below.

    The “Francoise” Halo Ring

    $3,200.00

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  • The "Angelica" ring in 14k white and yellow gold features a 2.30-carat Montana sapphire center surrounded by ten clear diamonds, displayed on a green-striped surface.The "Angelica" ring in 14k white and yellow gold, featuring a 2.30-carat Montana sapphire, is shown upright on a rough blue stone with the Earth's Treasury logo below.

    The “Angelica” Halo Ring

    $3,600.00

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  • The "Lenore" ring in 14k yellow gold features a 2.51-carat Australian sapphire and two pear-shaped side stones, shown on a green leaf background.The "Lenore" ring in 14k yellow gold features a twisted, vine-like band and a 2.51-carat Australian sapphire, shown upright on textured stone. "EARTH'S TREASURY" appears at the bottom.

    The “Lenore” Three-Stone Ring

    $2,900.00

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  • The Comet ring in platinum, featuring a 3.53-carat Montana sapphire and diamonds on the band, is displayed on a green striped leaf. "Earth's Treasury" appears at the bottom.The Comet ring in platinum features a 3.53-carat Montana sapphire as its central stone, accented by smaller side stones, and is displayed upright on a textured stone background.

    The Petite Pave “Comet” Hidden Halo Ring

    $2,900.00

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  • The Linnea ring in 14K yellow gold features a 1.15-carat round Ceylon sapphire centerpiece, accented by pink and white stones, displayed on a green leaf with the Earth's Treasury logo below.The Linnea ring in 14K yellow gold, featuring a 1.15-carat Ceylon sapphire and clear side stones, stands upright on a textured metallic surface with the Earth's Treasury logo displayed below.

    The “Linnea” Cluster Ring

    $2,900.00

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  • The "Kirryn" ring in 14K rose gold, set with a 1.17-carat Montana sapphire and leaf-inspired accents, stands upright on a green and gray surface with the Earth’s Treasury logo below.The "Kirryn" ring in 14K rose gold, featuring a 1.17-carat Montana sapphire and leaf motifs, is displayed upright on a rough blue stone background. Earth’s Treasury logo appears at the bottom.

    The “Kirryn” Solitaire

    $1,900.00

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  • The "Saorise" ring in 14K white gold features a 1.86-carat rectangular Mahenge garnet atop an intricate band, displayed on a green leaf. The Earth's Treasury logo enhances its signature elegance inspired by Saoirse.A 14K white gold "Saorise" solitaire ring with a 1.86-carat Mahenge garnet is displayed upright on a blue rock, with the Earth’s Treasury logo below.

    The “Saoirse” Solitaire

    $1,900.00

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  • A platinum Cathedral "Alyssum" ring featuring a 1.83-carat Ceylon sapphire is displayed upright against a green leaf background. The "Earth's Treasury" logo appears at the bottom.A platinum Cathedral "Alyssum" ring with a 1.83-carat Ceylon sapphire stands upright on a textured gray surface, exuding elegance. The "Earth's Treasury" logo appears at the bottom.

    The Cathedral “Alyssum” Solitaire

    $1,700.00

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  • The Cathedral "Fleur" ring in platinum with a 1.72-carat Montana sapphire is displayed upright against two stacked green leaves, with the "Earth's Treasury" logo and text at the bottom.The Cathedral "Fleur" ring in platinum features a 1.72-carat Montana sapphire in an intricate prong setting, displayed upright on a textured blue-gray stone background. Logo text at the bottom reads "Earth's Treasury.

    The Cathedral “Fleur” Solitaire

    $1,700.00

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  • A gold Cathedral Solitaire ring, "Fisher, Matthew," with a pear-shaped blue gemstone is shown on a green background, with "Earth's Treasury" at the bottom.The Cathedral "Anemone" ring in 14K yellow gold with a 2.37-carat Ceylon sapphire is displayed upright on a rough blue stone, with the "Earth's Treasury" logo and text below.

    The Cathedral “Anemone” Solitaire

    $1,700.00

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  • The "Sadie" ring in 14k yellow gold showcases a 1.22-carat Montana sapphire center, flanked by two pear-shaped clear stones, beautifully displayed on a green leaf.The "Sadie" ring in 14k yellow gold with a 1.22-carat Montana sapphire stands upright against a textured stone backdrop on a gray patterned surface. "EARTH'S TREASURY" is displayed at the bottom.

    The “Sadie” Three-Stone Ring

    $2,250.00

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  • A 1.79-carat Umbalite garnet with a faceted, deep pink hue rests on a textured light gray surface, with "EARTH'S TREASURY" at the bottom.

    1.79-Carat Rich Magenta Pink Rhodolite Garnet

    $900.00

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  • A 2.54-carat Umbalite garnet, featuring a faceted deep pink hue, is displayed on a textured grey surface with the text "EARTH'S TREASURY" below it.

    2.54-Carat Rich Magenta Pink Rhodolite Garnet

    $1,300.00

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  • A 3.10-carat Umbalite Garnet in deep pink rests on a textured gray surface, with "Earth's Treasury" and a hexagon logo at the bottom.

    3.10-Carat Deep Magenta Pink Rhodolite Garnet

    $1,550.00

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  • A 3.43-carat Umbalite Garnet, rectangular and faceted, rests on a textured gray surface with "EARTH'S TREASURY" visible below the gem.

    3.43-Carat Deep Magenta Pink Rhodolite Garnet

    $1,700.00

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  • A faceted, rectangular 4.26-carat Umbalite Garnet with a rich magenta hue rests on a textured, light gray surface. The "Earth's Treasury" logo is displayed at the bottom.

    4.26-Carat Deep Magenta Pink Rhodolite Garnet

    $2,150.00

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  • A faceted, deep pink 4.39-carat Umbalite garnet with an octagonal shape is displayed on a light, textured surface. The text "Earth's Treasury" appears at the bottom.

    4.39-Carat Deep Magenta Pink Rhodolite Garnet

    $2,200.00

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  • A 4.90-carat Umbalite garnet, featuring a faceted deep red hue, is showcased on a textured light gray surface with "Earth's Treasury" at the bottom.

    4.90-Carat Deep Magenta Pink Rhodolite Garnet

    $2,450.00

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  • A 1.38-carat Mahenge Garnet with a rectangular radiant cut is displayed on a textured gray surface, with "Earth's Treasury" shown below.

    1.38-Carat Bubblegum Pink Mahenge Garnet

    $800.00

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  • A 2.07-carat rectangular faceted Mahenge Garnet is shown on a textured gray surface with the "Earth's Treasury" logo and text beneath it.

    2.07-Carat Rich Raspberry Pink Mahenge Garnet

    $1,250.00

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  • A faceted, rectangular deep pink 2.27-carat Mahenge garnet rests on a textured gray surface; "EARTH'S TREASURY" is written at the bottom.

    2.27-Carat Rose Pink Mahenge Garnet

    $1,350.00

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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.