Natural Blue Spinel Gemstones – Rare Elegance for Custom Jewelry

Rare and Elegant: The Allure of Blue Spinel

Natural blue spinel is one of the rarest and most refined gemstones on the market. From icy sky blues to deep midnight tones, this gem offers a vibrant and sophisticated palette for high-end jewelry. Unlike sapphire, blue spinel often displays exceptional clarity and brilliance without requiring any treatments.

Unenhanced Beauty and Lasting Durability

Blue spinel is completely natural and typically untreated, prized by gem collectors and designers alike. With a hardness of 8 on the Mohs scale and a bright adamantine luster, it’s perfectly suited for rings, pendants, and heirloom-quality pieces that need to stand the test of time.

A Unique Alternative to Sapphire

Looking for a one-of-a-kind blue gemstone? Blue spinel offers a rare and refreshing choice. Its brilliance, rarity, and historical confusion with sapphire make it a hidden treasure in the world of fine gems.

August Birthstone with a Bold Twist

Spinel is an official birthstone for August, offering a vibrant, modern alternative to peridot. While peridot glows with summer greens, blue spinel delivers depth and elegance—perfect for Leos and Virgos who want something truly distinctive. Want to learn more? Read our Spinel Buying Guide.

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Grey Spinel 4.07 ct. Cushion Cut Grey Spinel 4.07 ct. Cushion Cut
Unheated Grayish Blue Spinel 4.07 ct – Cushion Cut from Mogok, Burma
$950.00
$950.00
Gorgeous greenish gray spinel, 3.13 ct, cushion cut. This natural and untreated gemstone has an antique cut, its size is ideal, neither too big nor too small. Its behaviour under light is amazing, has a beautiful color under incandescent light, and contains a small treasure inside, another small spinel fully formed, a delight both outside and inside. Mother nature is perfect. It will be ideal in any jewel that you want to personalize. Spinels are gems with rising value. Gorgeous greenish gray spinel, 3.13 ct, cushion cut. This natural and untreated gemstone has an antique cut, its size is ideal, neither too big nor too small. Its behaviour under light is amazing, has a beautiful color under incandescent light, and contains a small treasure inside, another small spinel fully formed, a delight both outside and inside. Mother nature is perfect. It will be ideal in any jewel that you want to personalize. Spinels are gems with rising value.
Natural Grey Spinel 3.13 ct – Antique Cushion with Unique Inclusion
$810.00
$810.00
Beautiful Pair of Deep Blue Mogok Spinel Oval cut 6.34 ct total Beautiful Pair of Deep Blue Mogok Spinel Oval cut 6.34 ct total
Matched Pair of Deep Blue Spinel from Mogok – Oval Cut, 6.34 ct Total
$790.00
$790.00
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Magnificent Greyish Blue Spinel Cushion Cut 4.80 ct under daylight (crown) Magnificent Greyish Blue Spinel Cushion Cut 4.80 ct under daylight
4.80 ct Grayish Blue Spinel – Burmese Cushion Cut Gem with Shifting Hues
$720.00
$720.00
Rare Blue Green Spinel 1.86 ct, cushion cut. This natural and untreated gemstone has an antique cut, its green color is very rare, its size is ideal, neither too big nor too small. Its behavior under light is amazing, has a beautiful and bright color under day light and more green under incandescent light. It will look perfect in your custom jewelry. Spinels are gems with rising value. Rare Blue Green Spinel 1.86 ct, cushion cut. This natural and untreated gemstone has an antique cut, its green color is very rare, its size is ideal, neither too big nor too small. Its behavior under light is amazing, has a beautiful and bright color under day light and more green under incandescent light. It will look perfect in your custom jewelry. Spinels are gems with rising value.
Natural Blue-Green Spinel 1.86 ct – Cushion Cut, Antique Style
$450.00
$450.00
Beautiful dark spinel of 1.59 ct with a trapezoidal cut. This beauty under fluorescent light shows an incredible and sparkle dark blue color with violet tones. Its fancy cut is amazing. It is a very special gemstone, it will look wonderful in any piece of jewelry you can imagine. Beautiful dark spinel of 1.59 ct with a trapezoidal cut. This beauty under fluorescent light shows an incredible and sparkle dark blue color with violet tones. Its fancy cut is amazing. It is a very special gemstone, it will look wonderful in any piece of jewelry you can imagine.
Trapezoid-Cut Violetish Blue Spinel – 1.59 ct | Natural Untreated Gemstone
$450.00
$450.00
Unheated Violet Grey Spinel Gem. Octagon Cut. 1.42 ct Unheated Violet Grey Spinel Gem. Octagon Cut. 1.42 ct under daylight
Unheated Violetish Blue Spinel – 1.42 ct, Octagon Cut
$300.00
$300.00
Beautiful Violetish Blue Spinel. Octagon Cut. 1.43 ct Beautiful Violetish Blue Spinel. Octagon Cut. 1.43 ct
Natural Violetish Blue Spinel 1.43 ct – Octagon Cut Color-Shift
$289.00
$289.00
Affordable Blue Grey Spinel Gemstone. Rectangle Cut. 2.14 ct. Maximum brilliance. This gem has a beautiful behavior under any type of light, it has a dark blue color full of bright sparkles. Inclusions visible only under the lens. Beautiful gemstone for your personalized jewelry. Affordable Blue Grey Spinel Gemstone. Rectangle Cut. 2.14 ct. Maximum brilliance. This gem has a beautiful behavior under any type of light, it has a dark blue color full of bright sparkles. Inclusions visible only under the lens. Beautiful gemstone for your personalized jewelry.
Blue Grey Spinel 2.14 ct – Rectangular Cut with Bright Sparkles
$280.00
$280.00
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Pretty Bluish Gray Spinel Unheated, Octagon Cut, 1.78 ct. Perfect for Engagement Ring Pretty Bluish Gray Spinel Unheated, Octagon Cut, 1.78 ct. Perfect for Engagement Ring
Bluish Gray Spinel, Octagon Cut, 1.78 ct – Unheated Sri Lankan Gemstone
$279.00
$279.00
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Affordable Blue Grey Spinel Gemstone Rectangle Cut 1.95 ct. Affordable Blue Grey Spinel Gemstone Rectangle Cut 1.95 ct.
1.95 ct Blue-Grey Spinel – Rectangle Cut – Sri Lanka
$271.00
$271.00
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Bluish Gray Spinel Unheated, Cushion Cut, 1.03 ct. Perfect for a special ring. This beautiful precious stone dark has a beautiful cut and shine, an excellent natural gem at an irresistible price. Bluish Gray Spinel Unheated, Cushion Cut, 1.03 ct. Perfect for a special ring. This beautiful precious stone dark has a beautiful cut and shine, an excellent natural gem at an irresistible price.
Natural Bluish Gray Spinel 1.03 ct – Unheated Cushion Cut Gem for Jewelry
$239.00
$239.00
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Bluish Grey Spinel, Square Cushion Cut, 1.10 ct. This beautiful precious stone dark has a beautiful metallic color and shine, its pavilion is a little high but this untreated gemstone once mounted in any kind of jewelry it will look precious. Bluish Grey Spinel, Square Cushion Cut, 1.10 ct. This beautiful precious stone dark has a beautiful metallic color and shine, its pavilion is a little high but this untreated gemstone once mounted in any kind of jewelry it will look precious.
Natural Bluish Grey Spinel – Square Cushion Cut, 1.10 ct – Unheated Gemstone
$220.00
$220.00
Greyish Blue Spinel Gemstone. Rectangle Cut. 1.30 ct Greyish Blue Spinel Gemstone. Rectangle Cut. 1.30 ct under daylight
Grayish Blue Spinel 1.30 ct – Natural Rectangular Gem from Sri Lanka
$160.00
$160.00
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Pretty Bluish Gray Spinel Unheated Cushion Cut 1.22 ct Pretty Bluish Gray Spinel Unheated Cushion Cut 1.22 ct
Bluish Grey Spinel 1.22 ct – Cushion Cut
$149.00
$149.00

The Timeless Charm of Natural Blue Spinel

Sought after for its rarity, brilliance, and unenhanced beauty, blue spinel is a sophisticated gem with a cool, calming soul. A true collector’s delight.

Related collections

Explore other spinel shades and discover the diversity of this historic gem. From fiery reds to delicate pinks and silvery greys, each variety offers a unique charm. And if you're looking for a meaningful gift, Spinel is one of the official August birthstones.

Hot Red Burmese Spinel Cushion Cut 0.92 ct

Red Spinel

Vivid red spinels rival rubies in brilliance and rarity. Discover gems with fiery passion and royal legacy.

Pink Spinel

Feminine, radiant, and full of charm—pink spinels are cherished for their joyful energy and elegant sparkle.

Grey Spinel

Their shifting colors and refined tones make grey spinels an unexpected favorite in modern fine jewelry.
Natural Green Peridot Fancy Cut 2.28 ct

August Birthstone: Peridot

Celebrate August with the vibrant green of peridot and the bold hues of spinel—two gems, one birthstone month.