Square Cushion

Showing 601–624 of 624 resultsSorted by latest

  • A 1.63-carat heated aqua blue Montana Sapphire with a cushion cut sits on a textured gray surface, showing light and dark blue facets. The text "Earth's Treasury" appears at the bottom.

    1.63-Carat Aqua Blue Montana Sapphire (Heated)

    $2,400.00

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  • A 1.54-carat deep peacock Montana sapphire (heated), square-cut, rests on a textured gray surface with "EARTH'S TREASURY" and a geometric logo below.

    1.54-Carat Deep Peacock Montana Sapphire (Heated)

    $3,100.00

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  • A faceted Montana Sapphire, product MS1762, with visible internal patterns is displayed on a light textured surface. The Earth's Treasury logo appears below the gem.

    2.08-Carat Medium Blue Montana Sapphire (Heated)

    $3,600.00

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  • The "Flora" ring in 18K yellow gold with 1.83-carat Montana sapphireThe "Flora" ring in 18K yellow gold with 1.83-carat Montana sapphire

    The “Flora” 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 "Cascade" ring in platinum features a 1.24-carat Ceylon sapphire at the center, accented by smaller clear stones on each side and elegantly displayed on a green plant stem.The Cascade ring in platinum with a 1.24-carat Ceylon sapphire is displayed upright against a blue rock on textured gray, with the "Earth's Treasury" logo at the bottom.

    The “Cascade” Ring

    $3,350.00

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  • Square-cut pink gemstone labeled "ET1357" at the bottom. The stone is placed on a textured gray surface.

    3.81-Carat Mauve-Pink California Tourmaline

    $1,150.00

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  • 0.70-Carat Purple-Pink Montana Sapphire

    0.70-Carat Purple-Pink Montana Sapphire

    $700.00

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  • A blue-green Montana sapphire in our "Aurora" square cushion design

    2.59-Carat Teal Blue Montana Sapphire (Heated)

    $6,475.00

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  • The "Twyg" ring in 14K white gold with a 2.05-carat Montana sapphire is shown upright on a green Twyg bamboo stalk, with the Earth's Treasury logo at the bottom of the image.The "Twyg" ring in 14K white gold, featuring a 2.05-carat Montana sapphire, is displayed atop a rough blue stone with the text "Earth's Treasury" below.

    The “Twyg” Solitaire

    $1,900.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • The "Anne" ring in 14k yellow gold features a 1.44-carat Australian sapphire, pear-shaped and surrounded by diamonds, displayed on a green leaf with "EARTH'S TREASURY" below.The "Anne" ring in 14k yellow gold with a 1.44-carat Australian sapphire stands upright on a rough gemstone, with the Earth’s Treasury logo shown below on a textured background.

    The “Anne” Halo Ring

    $2,600.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • A 1.74-carat deep blue-green heated Montana sapphire is shown with intricate square faceting on a textured light surface, featuring the text "EARTH'S TREASURY" at the bottom.

    1.74-Carat Deep Blue-Green Montana Sapphire (Heated)

    $2,600.00

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  • A square-cut green gemstone placed on a textured gray surface, accompanied by the text "EARTH'S TREASURY" underneath. The product is identified as ET1392.

    2.43-Carat Light Lime Green California Tourmaline

    $485.00

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  • The ET1429, a cushion-cut yellow-green gemstone featuring a radiant star-like pattern, is displayed on a textured gray surface.

    1.46-Carat Greenish Yellow California Tourmaline

    $300.00

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  • Introducing ET1108: A stunning square-cut green gemstone with precise facets, elegantly displayed on a textured gray surface.

    0.94-Carat Mint Green Merelani Mint Garnet

    $800.00

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  • The "Charlotte" ring in 14K white gold features a 1.71-carat Montana sapphire surrounded by clear stones in a split-shank halo design, displayed on a green leaf with the Earth's Treasury logo at the bottom.The "Charlotte" ring in 14K white gold with a 1.71-carat Montana sapphire is displayed upright against a rough blue mineral on a textured gray surface, with the Earth's Treasury logo at the bottom.

    The “Charlotte” Split-Shank Halo Ring

    $3,200.00

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  • The “Grace” ring in 14K yellow gold showcases a 1.74-carat Montana sapphire with a bezel-set halo of diamonds, elegantly displayed on a rough blue stone above the "Earth's Treasury" logo.The “Grace” ring in 14K yellow gold showcases a 1.74-carat Montana sapphire with a bezel-set halo of diamonds, elegantly displayed on a rough blue stone above the "Earth's Treasury" logo.

    The “Grace” Bezel-Set Halo Ring

    $2,600.00

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    Select optionsDone This product has multiple variants. The options may be chosen on the product page
  • A 1.07-carat light pink Ceylon sapphire cushion-cut gemstone displayed on a textured surface with "Earth's Treasury" beneath.

    1.07-Carat Light Pink Ceylon Sapphire (Heated)

    $900.00

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  • A blue Montana sapphire in our "Aurora" square cushion design

    1.26-Carat Sky Blue Montana Sapphire

    $1,200.00

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  • 1.06-Carat Aqua Green Montana Sapphire

    1.06-Carat Aqua Green Montana Sapphire

    $1,300.00

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  • 1.30-Carat Aqua Blue Montana Sapphire

    1.30-Carat Aqua Blue Montana Sapphire

    $1,625.00

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  • A 1.96-carat, medium blue Montana Sapphire (Heated) with intricate facets rests on a textured gray surface. "Earth's Treasury" appears at the bottom of the image.

    1.96-Carat Medium Blue Montana Sapphire (Heated)

    $2,940.00

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  • A 1.63-carat medium blue Montana Sapphire (heated) with a square cut rests on a textured surface, with "EARTH'S TREASURY" shown below.

    1.63-Carat Medium Blue Montana Sapphire (Heated)

    $3,700.00

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  • A 1.67-carat mint green grossular garnet with a square cut rests on a textured surface. Text below reads "Earth's Treasury.

    1.67-Carat Mint Green Grossular Garnet

    $1,100.00

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  • A 1.84-carat pink-peach pastel pyrope garnet is showcased on a textured gray surface, with the text "Earth's Treasury" at the bottom.

    1.84-Carat Light Peachy Pink Pastel Pyrope Garnet

    $900.00

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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.