Square Cushion

Showing 241–264 of 624 resultsSorted by latest

  • The "Posey" ring in 14k rose gold features a 1.38-carat Montana sapphire center gemstone with marquise-shaped white side stones, displayed on a green leaf with the Earth’s Treasury logo below.The "Posey" ring in 14k rose gold with a 1.38-carat Montana sapphire is displayed on a blue mineral and patterned surface.

    The “Posey” Cluster Ring

    $3,200.00

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  • The "Linden" Ring in Platinum with 1.76-Carat Montana SapphireThe "Linden" Ring in Platinum with 1.76-Carat Montana Sapphire

    The “Linden” Ring

    $2,450.00

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  • The “Briar” in Platinum with 2.05-Carat Montana SapphireThe “Briar” in Platinum with 2.05-Carat Montana Sapphire

    The “Briar” Diamond-Accented Solitaire

    $2,450.00

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  • The "Deliah" ring in 14k yellow gold with 1.82-carat Montana sapphireThe "Deliah" ring in 14k yellow gold with 1.82-carat Montana sapphire

    The “Deliah” Ring

    $2,900.00

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  • A particolored Montana sapphire in our "Stella" square cushion design

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

    $1,750.00

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  • A pale yellow Montana sapphire in our "Stella" square cushion design

    1.20-Carat Pale Yellow Montana Sapphire (Heated)

    $900.00

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  • 1.52-Carat Bright Orange Montana Sapphire (Heated)

    1.52-Carat Bright Orange Montana Sapphire (Heated)

    $1,650.00

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  • A teal Montana sapphire in our "Stella" square cushion design

    1.51-Carat Rich Teal Montana Sapphire (Heated)

    $2,850.00

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  • A blue Montana sapphire in our "Stella" square cushion design

    1.04-Carat Teal Blue Montana Sapphire (Heated)

    $1,400.00

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  • A 1.47-carat aqua blue Montana Sapphire (heated), square-cut with intricate facets, rests on a textured gray surface. The "Earth's Treasury" logo and text appear at the bottom of the image.

    1.47-Carat Aqua Blue Montana Sapphire (Heated)

    $2,700.00

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  • An aqua Montana sapphire in our "Stella" square cushion design

    0.90-Carat Aqua Blue Montana Sapphire (Heated)

    $900.00

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  • A sky blue Montana sapphire in our "Stella" square cushion design

    0.81-Carat Sky Blue Montana Sapphire (Heated)

    $800.00

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  • The “Magnolia” Ring in platinum with 1.59-Carat Montana SapphireThe “Magnolia” Ring in platinum with 1.59-Carat Montana Sapphire

    The “Magnolia” Ring

    $2,300.00

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  • Stacked from 39 images. Method=B (R=8, S=4) gold Gaia ring with large oval blue gemstone and two textured gold bands, displayed on a green leaf. 'Earth's Treasury' logo and text below.The "Gaia" ring in 14k yellow gold, featuring a 4.63-carat Montana Sapphire, stands upright on rough gray stone, with the Earth's Treasury logo at the bottom of the image.

    The “Gaia” Double Pave Ring

    $3,500.00

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  • The "Guanyin" ring in 18K yellow gold, featuring a 1.94-carat Malaia garnet, is displayed on dark stone with a geometric patterned background.The "Guanyin" ring in 18K yellow gold, featuring a 1.94-carat Malaia garnet, is displayed on dark stone with a geometric patterned background.

    The “Guanyin” Ring

    $2,250.00

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  • A color-change Montana sapphire in our "Stella" square cushion design

    1.29-Carat Steely Blue to Purple Color Change Montana Sapphire (Heated)

    $2,200.00

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  • A 1.25-carat blue-aqua particolored heated Montana Sapphire with cushion cut is showcased on a textured light surface. The "Earth's Treasury" logo is displayed at the bottom.

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

    $2,100.00

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  • A blue Montana sapphire in our "Stella" square cushion design

    1.41-Carat Teal Blue Montana Sapphire (Heated)

    $1,100.00

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  • A blue Montana sapphire in our "Stella" square cushion design

    0.84-Carat Sky Blue Montana Sapphire (Heated)

    $750.00

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  • A 1.35-carat mint garnet, cut in a square shape and featuring a pale green hue, is displayed on a textured surface with the words "Earth's Treasury" visible beneath it.

    1.35-Carat Pale Green Merelani Mint Garnet

    $675.00

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  • A particolored Australian Sapphire in our "Stella" square cushion design

    1.51-Carat Teal-Green Particolored Australian Sapphire (Heated)

    $2,550.00

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  • A blue Australian Sapphire in our "Stella" square cushion design

    0.89-Carat Near Black Australian Sapphire (Heated)

    $800.00

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  • A green Australian Sapphire in our "Stella" square cushion design

    2.09-Carat Deep Green Australian Sapphire (Heated)

    $5,300.00

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  • 1.01-Carat Light Aqua Blue Montana Sapphire (Heated)

    1.01-Carat Light Aqua Blue Montana Sapphire (Heated)

    $1,500.00

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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.