Square Cushion

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  • The "Carina" ring in 14k white gold, featuring a 1.53-carat Montana Sapphire flanked by marquise-cut gems, is displayed on a green plant stem. The "Earth's Treasury" logo appears at the bottom, enhancing its elegance.A "Carina" ring in 14k white gold with a 1.53-carat Montana sapphire is shown upright from the side on a textured surface, featuring the "Earth’s Treasury" logo at the bottom.

    The “Carina” Ring

    $2,400.00

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  • The "Cerise" ring in 14k white gold with 1.05-Carat Montana SapphireThe "Cerise" ring in 14k white gold with 1.05-Carat Montana Sapphire

    The “Cerise” Diamond-Accented Solitaire

    $1,800.00

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  • The "Stacked from 61 images. Method=B (R=1,S=4)" pendant features a round blue gemstone with two marquise-cut clear stones, evoking a three-stone ring, set against a green and white leafy background.A minimal ring with a large blue gemstone, "Stacked from 61 images. Method=B (R=1,S=4)", is displayed upright before a matching rough blue stone on a textured grey surface. The "EARTH'S TREASURY" logo appears below.

    The Minimal “Avalon” Three-Stone Hidden Halo Ring

    $2,500.00

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  • 1.06-Carat Aqua Blue Montana Sapphire (Heated)

    1.06-Carat Aqua Blue Montana Sapphire (Heated)

    $1,600.00

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  • 1.09-Carat Orange Montana Sapphire (Heated)

    1.09-Carat Orange Montana Sapphire (Heated)

    $1,600.00

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  • 1.34-Carat Rich Blue Montana Sapphire (Heated)

    1.34-Carat Rich Blue Montana Sapphire (Heated)

    $950.00

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  • 1.34-Carat Yellow-Mint Particolored Montana Sapphire (Heated)

    1.34-Carat Yellow-Mint Particolored Montana Sapphire (Heated)

    $1,600.00

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  • A 1.03-carat Sky Blue Montana Sapphire (heated) with a cushion cut and starburst pattern rests on a textured gray surface, with the Earth's Treasury logo visible at the bottom.

    1.03-Carat Sky Blue Montana Sapphire (Heated)

    $1,700.00

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  • A 1.06-carat Teal Blue Montana Sapphire (heated), cushion-cut with intricate facets, sits on a textured gray surface. "EARTH'S TREASURY" is displayed at the bottom of the image.

    1.06-Carat Teal Blue Montana Sapphire (Heated)

    $1,700.00

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  • 1.24-Carat Pale Sky Blue Montana Sapphire (Heated)

    1.24-Carat Pale Sky Blue Montana Sapphire (Heated)

    $900.00

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  • A 1.92-carat Deep Blue Montana Sapphire (heated) with cushion cut and geometric facets rests on a textured metallic surface, with the Earth’s Treasury logo at the bottom of the image.

    1.92-Carat Deep Blue Montana Sapphire (Heated)

    $3,500.00

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  • A close-up photo of the polished, cushion-cut 4.23-Carat Pale Aqua Montana Sapphire, featuring a "Earth's Treasury" logo at the bottom center. The gem exhibits a stunning array of sparkling facets against a textured surface background.

    4.23-Carat Pale Aqua Montana Sapphire

    $17,950.00

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  • A 1.81-carat deep blue-green heated Montana Sapphire is displayed on a textured gray surface with "EARTH'S TREASURY" written below.

    1.81-Carat Deep Blue-Green Montana Sapphire (Heated)

    $2,300.00

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  • A 1.95-carat blue-green-yellow particolored Montana sapphire (heated) with multifaceted reflections is displayed on a textured gray surface. The Earth’s Treasury logo is visible at the bottom.

    1.95-Carat Blue-Green-Yellow Particolored Montana Sapphire (Heated)

    $3,400.00

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  • 1.21-Carat Teal Blue Montana Sapphire (Heated)

    1.21-Carat Teal Blue Montana Sapphire (Heated)

    $950.00

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  • 4.53-Carat Sky Blue Ceylon Sapphire (Heated)

    4.53-Carat Sky Blue Ceylon Sapphire (Heated)

    $17,000.00

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  • 0.89-Carat Medium Blue Montana Sapphire

    0.89-Carat Medium Blue Montana Sapphire

    $1,100.00

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  • 0.90-Carat Light Blue Montana Sapphire

    0.90-Carat Light Blue Montana Sapphire

    $1,250.00

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  • 0.97-Carat Rich Blue Montana Sapphire (Heated)

    0.97-Carat Rich Blue Montana Sapphire (Heated)

    $950.00

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  • 0.99-Carat Medium Blue Montana Sapphire (Heated)

    0.99-Carat Medium Blue Montana Sapphire (Heated)

    $950.00

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  • 1.00-Carat Steely Blue Montana Sapphire (Heated)

    1.00-Carat Steely Blue Montana Sapphire (Heated)

    $1,250.00

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  • 1.07-Carat Pale Aqua Montana Sapphire (Heated)

    1.07-Carat Pale Aqua Montana Sapphire (Heated)

    $1,550.00

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  • 1.08-Carat Light Sky Blue Montana Sapphire (Heated)

    1.08-Carat Light Sky Blue Montana Sapphire (Heated)

    $1,600.00

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  • 1.09-Carat Light Sky Blue Montana Sapphire (Heated)

    1.09-Carat Light Sky Blue Montana Sapphire (Heated)

    $1,600.00

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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.