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  • A round brilliant-cut gray 1.52-carat spinel is displayed upright on a textured surface, with the text "EARTH'S TREASURY" below it.

    1.52-Carat Gray Spinel

    $1,500.00

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  • A 2.15-carat spinel gemstone, oval-cut and dark blue-green, rests on a textured light gray surface with "Earth's Treasury" written below.

    2.15-Carat Deep Gray Spinel

    $2,400.00

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  • A 2.43-carat, oval-cut dark gray Spinel displayed on a textured light surface with “EARTH'S TREASURY” below.

    2.43-Carat Gray Spinel

    $1,950.00

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  • 1.72-Carat Gray Montana Sapphire (Heated)

    1.72-Carat Gray Montana Sapphire (Heated)

    $2,300.00

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  • A 1.29-carat Montana Sapphire with a bluish-gray hue rests on a textured surface. The "EARTH'S TREASURY" logo and text are shown at the bottom.

    1.29-Carat Pale Aqua-Yellow Particolored Montana Sapphire

    $2,200.00

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  • A 1.00-carat faceted rectangular gemstone shines in a deep peacock blue on a textured light gray surface. This heated Montana Sapphire captivates with its rich color and brilliance. At the bottom, the logo reads "Earth's Treasury.

    1.00-Carat Gray-Aqua Montana Sapphire (Heated)

    $1,500.00

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  • A faceted, clear 1.11-carat Spinel with an octagonal shape rests on a textured surface.

    1.11-Carat Gray Spinel

    $1,300.00

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  • A 1.29-carat rectangular faceted Gray Montana Sapphire with a complex cut rests on a textured surface, featuring the "EARTH'S TREASURY" text at the bottom.

    1.29-Carat Gray Montana Sapphire

    $2,200.00

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  • 1.90-Carat Pale Gray Montana Sapphire

    1.90-Carat Pale Gray Montana Sapphire

    $5,400.00

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  • A gray Montana sapphire in our "Eureka" rectangle design

    0.82-Carat Gray Montana Sapphire

    $700.00

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  • 1.42-Carat Gray-Blue Particolored Umba Sapphire

    1.42-Carat Gray-Blue Particolored Umba Sapphire

    $1,400.00

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  • 2.49-Carat Gray-Blue Particolored Umba Sapphire

    2.49-Carat Gray-Blue Particolored Umba Sapphire

    $1,900.00

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  • 1.39-Carat Bluish Gray Umba Sapphire

    1.39-Carat Bluish Gray Umba Sapphire

    $800.00

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  • 1.31-Carat Pale Gray Umba Sapphire

    1.31-Carat Pale Gray Umba Sapphire

    $1,300.00

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  • 0.79-Carat Pale Gray Umba Sapphire

    0.79-Carat Pale Gray Umba Sapphire

    $600.00

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  • A blue Montana sapphire in a classic diamond round brilliant design

    0.82-Carat Grayish Blue Montana Sapphire

    $675.00

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  • 0.88-Carat Pale Aqua-Gray Montana Sapphire

    0.88-Carat Pale Aqua-Gray Montana Sapphire

    $850.00

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  • 1.05-Carat Light Gray-Blue Montana Sapphire

    1.05-Carat Light Gray-Blue Montana Sapphire

    $800.00

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  • 1.02-Carat Gray-Aqua Montana Sapphire

    1.02-Carat Gray-Aqua Montana Sapphire

    $800.00

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  • 1.05-Carat Pale Aqua-Gray Montana Sapphire

    1.05-Carat Pale Aqua-Gray Montana Sapphire

    $800.00

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    Add to cartDone

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.