Rectangle Cushion

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  • A multifaceted, rectangular, 1.12-carat rich teal Montana sapphire (heated) is displayed against a textured, light background. The text "EARTH'S TREASURY" appears beneath the gemstone in black.

    1.12-Carat Rich Teal Montana Sapphire (Heated)

    $1,400.00

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  • A 1.02-carat rich Sky Blue Montana Sapphire (heated), faceted in a rectangular shape with a starburst pattern, is displayed on a textured surface above the Earth’s Treasury logo.

    1.02-Carat Rich Sky Blue Montana Sapphire (Heated)

    $1,950.00

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  • 1.40-Carat Peacock Blue Montana Sapphire (Heated)

    1.40-Carat Peacock Blue Montana Sapphire (Heated)

    $2,600.00

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  • A radiant-cut Sky Blue Montana Sapphire (0.87 carats, heated) with intricate facets reflecting light, placed on a textured beige surface. The bottom of the image displays the text "EARTH'S TREASURY" alongside a hexagonal logo.

    0.87-Carat Sky Blue Montana Sapphire (Heated)

    $800.00

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  • 0.73-Carat Near Colorless Montana Sapphire

    0.73-Carat Near Colorless Montana Sapphire

    $750.00

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  • The "Catarina" ring, crafted in 14k yellow gold and featuring a 1.64-carat blue Montana center stone, is adorned with sparkling white diamonds around it, shining beautifully against a green backdrop.Set against a textured gray background, The "Catarina" ring in 14k yellow gold showcases a 1.64-carat Montana sapphire, elegantly surrounded by small radiant diamonds.

    The “Catarina” Hidden Halo Ring

    $2,400.00

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  • 1.92-Carat Greenish Yellow Australian Sapphire (Heated)

    1.92-Carat Greenish Yellow Australian Sapphire (Heated)

    $2,900.00

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  • 1.10-Carat Rich Blue Ceylon Sapphire (Heated)

    1.10-Carat Rich Blue Ceylon Sapphire (Heated)

    $2,500.00

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  • 5.73-Carat Cornflower Blue Ceylon Sapphire (Heated)

    5.74-Carat Cornflower Blue Ceylon Sapphire (Heated)

    $19,500.00

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  • The "Odelia" in platinum with 1.30-carat diamond, alongside the "Odelia" band in platinumThe "Odelia" in platinum with 1.30-carat diamond

    The “Odelia” Ring

    $2,950.00

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  • The Ornate "Cattleya" ring in platinum with 1.49-carat Montana sapphireThe Ornate "Cattleya" ring in platinum with 1.49-carat Montana sapphire

    The Ornate “Cattleya” Ring

    $2,900.00

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  • The Wide "Larisa" ring in 14k white gold with 1.42-carat Montana sapphireThe Wide "Larisa" ring in 14k white gold with 1.42-carat Montana sapphire

    The Wide “Larisa” Solitaire

    $2,700.00

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  • The Deluxe Pave “Madeline” Hidden Halo Ring in 18k white gold with 2.72-Carat Montana SapphireThe Deluxe Pave “Madeline” Hidden Halo Ring in 18k white gold with 2.72-Carat Montana Sapphire

    The Deluxe Pave “Madeline” Hidden Halo Ring

    $3,000.00

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  • The "Ariadne" Five-Stone Ring in 14k yellow gold with 2.41-Carat Montana SapphireThe "Ariadne" Five-Stone Ring in 14k yellow gold with 2.41-Carat Montana Sapphire

    The “Ariadne” Five-Stone Ring

    $5,200.00

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  • The "Ramona" Three-Stone Ring in 18k yellow gold with 4.02-Carat Montana SapphireThe "Ramona" Three-Stone Ring in 18k yellow gold with 4.02-Carat Montana Sapphire

    The “Ramona” Three-Stone Ring

    $4,500.00

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  • The "Paloma" ring in 14k yellow gold with 1.85-carat Montana sapphireThe "Paloma" ring in 14k yellow gold with 1.85-carat Montana sapphire

    The “Paloma” Diamond-Accented Solitaire

    $1,800.00

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  • The "Finella" ring in platinum, featuring a 2.13-carat Montana sapphire and small clear side stones, is displayed on a green leaf with the "EARTH'S TREASURY" logo at the bottom.The "Finella" ring in platinum with a 2.13-carat Montana sapphire is shown upright on a textured gray stone background, sparkling side accents aglow. "EARTH'S TREASURY" appears at the bottom.

    The “Finella” Three-Stone Ring

    $1,950.00

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  • The Low-Profile "Emma" ring in 14K rose gold with a 0.76-carat Montana sapphire is shown vertically on a green leaf, with "Earth's Treasury" displayed below.A 0.76-carat Montana sapphire Low-Profile "Emma" ring in 14K rose gold rests on a rough blue stone atop a patterned metallic surface. Below, "EARTH'S TREASURY" highlights the ring’s elegant solitaire design.

    The Low-Profile “Emma” Solitaire

    $2,200.00

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  • The "Milos" Ring in 14k yellow gold with 1.02-Carat Montana SapphireThe "Milos" Ring in 14k yellow gold with 1.02-Carat Montana Sapphire

    The “Milos” Solitaire

    $1,900.00

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  • The Straight Sappho in 14k yellow gold with 1.06-carat Montana sapphireThe Straight Sappho in 14k yellow gold with 1.06-carat Montana sapphire

    The Straight “Sappho” Cluster Ring

    $2,300.00

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  • The "Elaine" ring in 18k yellow gold with 1.64-carat Montana sapphireThe "Elaine" ring in 18k yellow gold with 1.64-carat Montana sapphire

    The “Elaine” Halo Ring

    $2,800.00

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  • The "Vivian" ring in platinum with 1.02-Carat Demantoid GarnetThe "Vivian" ring in platinum with 1.02-Carat Demantoid Garnet

    The “Vivian” Halo Ring

    $2,600.00

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  • The "Felicia" ring in 14k yellow gold with 1.12-carat Montana sapphireThe "Felicia" ring in 14k yellow gold with 1.12-carat Montana sapphire

    The “Felicia” Hidden Halo Solitaire

    $1,800.00

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  • The “Aislinn” ring in 14k rose gold showcases a 1.69-carat Montana sapphire and Celtic-inspired details, elegantly photographed on a green textured background.The "Aislinn" ring in 14k rose gold features a 1.69-carat Montana sapphire and an intricate band, standing upright on a textured grey background with the Earth's Treasury logo at the bottom.

    The “Aislinn” Ring

    $2,350.00

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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.