Oval

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  • A yellow Montana sapphire in our "Serendipity" oval design

    1.28-Carat Pale Yellow-Gold Particolored Montana Sapphire (Heated)

    $1,600.00

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  • A blue Montana sapphire in our "Serendipity" oval design

    0.84-Carat Medium-Sky Blue Particolored Montana Sapphire (Heated)

    $850.00

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  • A violet blue Montana sapphire in our "Serendipity" oval design

    1.03-Carat Rich Violet-Blue Montana Sapphire (Heated)

    $1,000.00

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  • 1.24-Carat Golden Yellow Montana Sapphire (Heated)

    1.24-Carat Golden Yellow Montana Sapphire (Heated)

    $1,500.00

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  • 1.31-Carat Yellow-Gold Particolored Montana Sapphire (Heated)

    1.31-Carat Yellow-Gold Particolored Montana Sapphire (Heated)

    $1,900.00

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  • A 1.28-carat medium blue Montana Sapphire (heated), round brilliant-cut with geometric facets, is displayed on a textured gray surface with the "Earth's Treasury" logo below.

    1.28-Carat Medium Blue Montana Sapphire (Heated)

    $2,100.00

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  • An aqua Montana sapphire in our "Serendipity" oval design

    0.81-Carat Aqua Blue Montana Sapphire (Heated)

    $800.00

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  • An aqua Montana sapphire in our "Serendipity" oval design

    1.03-Carat Aqua Blue Montana Sapphire (Heated)

    $1,250.00

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  • A blue Montana sapphire in our "Serendipity" oval design

    1.16-Carat Medium Blue Montana Sapphire (Heated)

    $1,600.00

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  • A 1.74-carat medium blue Montana Sapphire (heated) with a geometric cut is displayed on a textured gray surface. The "EARTH'S TREASURY" logo and text are shown at the bottom of the image.

    1.74-Carat Medium Blue Montana Sapphire (Heated)

    $4,350.00

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  • A blue Montana sapphire in our "Serendipity" oval design

    1.17-Carat Medium Blue Montana Sapphire (Heated)

    $1,100.00

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  • A blue Montana sapphire in our "Serendipity" oval design

    0.80-Carat Medium Blue Montana Sapphire (Heated)

    $750.00

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  • A blue Montana sapphire in our "Serendipity" oval design

    0.94-Carat Medium Blue Montana Sapphire (Heated)

    $940.00

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  • A blue Montana sapphire in our "Serendipity" oval design

    1.18-Carat Medium Blue Montana Sapphire (Heated)

    $1,600.00

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    Add to cartDone
  • A blue Montana sapphire in our "Serendipity" oval design

    0.85-Carat Sky Blue Montana Sapphire (Heated)

    $850.00

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    Add to cartDone
  • 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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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • 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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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • 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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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • A blue Montana sapphire in our "Testudo" oval design

    0.88-Carat Medium Blue Montana Sapphire (Heated)

    $900.00

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  • A blue Montana sapphire in our "Testudo" oval design

    0.83-Carat Sky Blue Montana Sapphire (Heated)

    $800.00

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  • A 1.36-carat heated teal blue Montana Sapphire rests on a textured gray surface, with "Earth's Treasury" below it.

    1.36-Carat Teal Blue Montana Sapphire (Heated)

    $2,100.00

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  • A blue-green Montana sapphire in our "Hyperbola" oval design

    1.33-Carat Teal Blue Montana Sapphire (Heated)

    $1,650.00

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  • A blue Montana sapphire in our "Hyperbola" oval design

    1.04-Carat Pale Sky Blue Montana Sapphire (Heated)

    $1,700.00

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    Add to cartDone
  • A 1.67-carat medium blue Montana Sapphire (heated) is displayed on a textured gray surface with the text "Earth's Treasury" and a hexagon logo beneath it.

    1.67-Carat Medium Blue Montana Sapphire (Heated)

    $3,250.00

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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.