Rectangle Cushion

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  • A 2.45-carat cushion-cut gray spinel with a faceted surface is displayed on a textured gray background. The text "Earth's Treasury" appears at the bottom.

    2.45-Carat Dark Gray Spinel

    $1,750.00

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  • A 2.54-carat spinel gemstone is displayed on a textured light gray surface with the "Earth's Treasury" logo below.

    2.54-Carat Deep Blue-Green Spinel

    $2,500.00

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  • A 2.55-carat cushion-cut, dark gray spinel gemstone displayed on a light textured surface with the text "Earth's Treasury" at the bottom.

    2.55-Carat Gray Spinel

    $2,000.00

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  • A 2.58-carat, cushion-cut deep red spinel rests on a textured light gray surface, with "EARTH'S TREASURY" displayed at the bottom.

    2.58-Carat Deep Red Spinel

    $9,900.00

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  • A 2.60-carat, cushion-cut pale purple spinel gemstone is displayed on a textured gray surface with "Earth's Treasury" at the bottom.

    2.60-Carat Light Lavender Spinel

    $4,600.00

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  • A 2.64-carat cushion-cut purple spinel is displayed on a textured gray surface with the "Earth’s Treasury" logo beneath it.

    2.64-Carat Magenta Purple Spinel

    $5,100.00

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  • A 2.67-carat cushion-cut spinel gemstone in shades of purple and gray, displayed on a textured surface with "Earth's Treasury" written below.

    2.67-Carat Mauve Purple Spinel

    $4,700.00

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  • A 2.74-carat cushion-cut red Spinel is showcased on a light gray textured surface, with the text "EARTH'S TREASURY" at the bottom.

    2.74-Carat Deep Red Spinel

    $10,500.00

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  • A 2.79-carat cushion-cut dark violet Spinel is displayed on a light textured surface with the text "Earth's Treasury" below it.

    2.79-Carat Purple Spinel

    $2,800.00

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  • A 2.88-carat, cushion-cut purple Spinel gemstone is shown on a textured surface with the text "EARTH'S TREASURY" below it.

    2.88-Carat Purple Spinel

    $5,100.00

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  • A 1.25-carat heated Montana sapphire, rectangular and deep blue with faceted cuts, is displayed on a textured gray surface featuring the "EARTH'S TREASURY" text at the bottom.

    1.25-Carat Peacock Blue Montana Sapphire (Heated)

    $1,850.00

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  • The “Ailette” ring in 14K yellow gold features a 1.44-carat round Montana sapphire center, surrounded by small white diamonds, displayed on a green leaf background.The "Ailette" ring in 14K yellow gold with a 1.44-carat Montana sapphire stands upright on a textured gray surface, its intricate design framing the rough blue stone above the Earth's Treasury logo.

    The “Ailette” Halo Ring

    $2,450.00

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  • A 1.71-carat heated Montana sapphire with a rectangular faceted cut and pale blue-green hue rests on a textured gray surface displaying the "Earth's Treasury" logo at the bottom.

    1.71-Carat Aqua-Yellow Particolored Montana Sapphire (Heated)

    $2,300.00

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  • A 0.69-carat Montana Sapphire with a radiant cut is displayed on a textured gray surface, featuring the "Earth's Treasury" text at the bottom.

    0.69-Carat Lilac Pink Montana Sapphire

    $700.00

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  • A 2.33-Carat Montana Sapphire, rectangular and faceted in vibrant violet-blue, is displayed on a textured surface with "EARTH'S TREASURY" shown at the bottom.

    2.33-Carat Violet-Blue Montana Sapphire

    $8,850.00

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  • The "Kyria" ring is crafted in 14k yellow gold, featuring a 1.41-carat Montana sapphire and small round diamonds on each side, displayed against a green striped background.The "Kyria" ring in 14k yellow gold with a 1.41-carat Montana sapphire stands upright on a rough blue stone atop a textured gray surface, with "EARTH'S TREASURY" shown at the bottom.

    The “Kyria” Ring

    $1,800.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • A 1.24-carat, rectangular bi-color Australian sapphire (heated), with blue and green hues, rests on a textured gray surface. The words "Earth's Treasury" appear at the bottom.

    1.24-Carat Rich Teal Australian Sapphire (Heated)

    $1,850.00

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  • A 1.19-carat Australian Sapphire (heated) with a rectangular, faceted form and blue-green hues sits on a textured surface.

    1.19-Carat Rich Teal Australian Sapphire (Heated)

    $2,100.00

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  • Blue-green faceted 1.40-carat Australian Sapphire with a textured surface; text reads "Earth's Treasury.

    1.40-Carat Peacock-Teal Particolored Australian Sapphire (Heated)

    $2,100.00

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  • A 1.84-carat Australian Sapphire (heated), sparkling with a rectangular green-yellow faceted surface, rests on a textured gray background.

    1.84-Carat Yellow-Green Particolored Australian Sapphire (Heated)

    $2,500.00

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  • A dazzling square-cut green gem, the 5.02-Carat Tsavorite Garnet, rests on a textured background with "Earth's Treasury" stylishly displayed beneath it.

    5.02-Carat Tsavorite Garnet

    $20,080.00

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  • A faceted light blue 1.25-Carat Ceylon Sapphire sits on a textured surface, featuring the "Earth's Treasury" logo at the bottom.

    1.25-Carat Light Sky Blue Ceylon Sapphire

    $2,500.00

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  • A vibrant blue 1.45-Carat Ceylon Sapphire with intricate facets lies on a textured surface, with "Earth's Treasury" visible below.

    1.45-Carat Rich Blue Ceylon Sapphire

    $3,700.00

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  • A 2.67-carat Ceylon Sapphire with internal patterns rests on a textured surface, with "Earth's Treasury" below.

    2.67-Carat Light Violet-Blue Ceylon Sapphire

    $8,000.00

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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.