Square Cushion

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  • A faceted blue gemstone with a radiant cut placed on a textured background. Text below reads "1.39-Carat Nasarawa Teal Aqua by Earth's Treasury.

    1.39-Carat Nasarawa Teal Aqua

    $1,750.00

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  • A 1.20-carat Tsavorite Garnet rests on a textured gray surface, with the label "Earth's Treasury" at the bottom.

    1.20-Carat Tsavorite Garnet

    $820.00

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  • A 1.43-carat Tsavorite Garnet gemstone with a faceted cut displayed on a textured gray surface, accompanied by the text "Earth's Treasury" underneath.

    1.43-Carat Tsavorite Garnet

    $1,700.00

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  • 1.16-Carat Violet-Blue Montana Sapphire (Heated)

    1.16-Carat Violet-Blue Montana Sapphire (Heated)

    $1,600.00

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  • A 1.35-carat teal blue Montana sapphire (heated), cushion-cut and beautifully faceted, rests on a textured light background above the "EARTH'S TREASURY" logo.

    1.35-Carat Teal Blue Montana Sapphire (Heated)

    $2,300.00

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  • A 1.47-carat medium blue heated Montana Sapphire is displayed on a textured gray surface featuring the "Earth's Treasury" logo at the bottom.

    1.47-Carat Medium Blue Montana Sapphire (Heated)

    $2,950.00

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  • A 1.53-carat heated Aqua Blue Montana Sapphire with a cushion cut and intricate facets rests on a textured gray surface. "EARTH'S TREASURY" and its logo appear at the bottom of the image.

    1.53-Carat Aqua Blue Montana Sapphire (Heated)

    $2,800.00

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  • A 1.54-carat medium blue Montana sapphire (heated) with a cushion cut is shown on a textured surface, featuring the "EARTH'S TREASURY" text and logo at the bottom.

    1.54-Carat Medium Blue Montana Sapphire (Heated)

    $2,600.00

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  • Product SNYTHR-11041-1200-BW, a Teal Blue Montana Sapphire with a star-like internal pattern, is shown on a textured gray surface with the "Earth's Treasury" logo beneath.

    1.79-Carat Teal Blue Montana Sapphire (Heated)

    $3,400.00

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  • A faceted, square-cut 1.81-Carat Deep Blue Montana Sapphire (Heated) is displayed on a textured gray surface, with the Earth’s Treasury logo beneath.

    1.81-Carat Deep Blue Montana Sapphire (Heated)

    $3,650.00

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  • A 1.82-carat blue-green Montana sapphire (heated) is displayed on a textured surface with the "EARTH'S TREASURY" logo and text beneath it.

    1.82-Carat Blue-Green Montana Sapphire (Heated)

    $2,700.00

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  • A stackable silver ring with a square bezel-set blue gemstone is displayed on a green leaf, with "McMinn, Richard and Gomez, Eric" written below.A solitaire ring with a rough blue gemstone is shown on a gray patterned surface, labeled "McMinn, Richard and Gomez, Eric" below.

    The Stackable “Emma” Solitaire

    $2,200.00

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  • The "Diana" ring in 18K yellow gold features a 1.08-carat Montana sapphire center surrounded by diamonds, shown on a green striped leaf.The "Diana" ring in 18K yellow gold with a 1.08-carat Montana sapphire is displayed on a metallic, patterned background featuring the "Earth's Treasury" logo at the bottom.

    The “Diana” Halo Ring

    $2,450.00

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  • Showcasing the "Liriope" ring in 14k rose gold, this piece features a 1.40-carat Montana sapphire at its center with marquise and pear-shaped clear stones, elegantly displayed on a green background.The "Liriope" ring in 14k rose gold features a 1.40-carat Montana sapphire, elegantly set atop a rough blue stone and displayed with the Earth's Treasury logo below.

    The “Liriope” Ring

    $2,700.00

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  • A "Nelisa" solitaire ring in 14K white gold with a 1.51-carat Montana sapphire is displayed on a green leaf. The Earth's Treasury logo is shown at the bottom of the image.The "Nelisa" ring in 14K white gold with a 1.51-carat Montana sapphire is displayed upright before a rough blue stone on a patterned surface, with "EARTH'S TREASURY" shown at the bottom.

    The “Nelisa” Solitaire

    $1,700.00

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  • The "Clematis" Ring in platinum features a 1.62-carat round Madagascar sapphire at the center, accented by two pear-shaped clear stones, shown displayed on a green leaf.The "Clematis" Ring in platinum features a 1.62-carat Madagascar sapphire and an intricate prong setting, displayed upright on a gray textured surface with Earth’s Treasury logo below.

    The “Clematis” Three-Stone Trellis Ring

    $2,450.00

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  • The "Erythia" ring in 20K pink gold, featuring a 1.42-carat oval Montana sapphire and six round diamonds, rests on a green plant leaf above the "EARTH'S TREASURY" text, highlighting exquisite Erythia jewelry.The "Erythia" ring in 20K pink gold, featuring a 1.42-carat Montana sapphire, is shown upright on a rough blue stone with a textured metallic background.

    The “Erythia” Cluster Ring

    $2,300.00

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  • A 1.39-carat medium blue Montana Sapphire (heated), cushion-cut with intricate facets, is displayed on a textured gray surface featuring the text "Earth's Treasury" at the bottom.

    1.39-Carat Teal Blue Montana Sapphire (Heated)

    $2,500.00

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  • A 1.51-carat teal blue Montana sapphire (heated), cushion-cut with intricate facets, is displayed on a textured gray surface with "Earth's Treasury" branding below.

    1.51-Carat Teal Blue Montana Sapphire (Heated)

    $2,950.00

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  • 1.59-Carat Bright Orange Montana Sapphire (Heated)

    1.59-Carat Bright Orange Montana Sapphire (Heated)

    $2,800.00

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  • 1.78-Carat Aqua Blue Montana Sapphire (Heated)

    1.78-Carat Aqua Blue Montana Sapphire (Heated)

    $2,600.00

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  • A 2.40-carat Rich Blue Montana Sapphire with cushion cut and star-like facets is displayed on a textured gray surface, with the Earth's Treasury logo at the bottom.

    2.40-Carat Rich Blue Montana Sapphire

    $7,200.00

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  • The "Snowflake" ring in 18K yellow gold, hammered and polished, featuring a 1.80-carat Montana sapphire, stands upright on a green leaf with the Earth's Treasury logo below—evoking the style of Snowflake Solitaire.The "Snowflake" ring in 18K yellow gold, hammered and polished, with a 1.80-carat Montana sapphire is displayed upright on a blue rough stone atop a textured surface, with the Earth’s Treasury logo at the bottom.

    The “Snowflake” Solitaire

    $1,700.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • The "Mavis" ring in 14K white gold showcases a 1.02-carat Montana sapphire center and two triangular clear stones, beautifully set against a green leaf background.The "Mavis" ring in 14K white gold with a 1.02-carat Montana sapphire is shown upright on a blue stone, with the "Earth's Treasury" logo beneath on a textured background.

    The “Mavis” Three-Stone Ring

    $2,700.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page

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.