Cobalt Spinel Ring, Untreated, 5.23 Carats
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Cobalt Spinel Ring, Untreated, 5.23 Carats
Click to Enlarge
Cobalt Spinel Ring, Untreated, 5.23 Carats
Click to Enlarge
Cobalt Spinel Ring, Untreated, 5.23 Carats
Cobalt Spinel Ring, Untreated, 5.23 Carats
Cobalt Spinel Ring, Untreated, 5.23 Carats
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Cobalt Spinel Ring, Untreated, 5.23 Carats

  • This exceptional ring is centered by a cushion cut cobalt spinel weighing 5.23 carats
  • The gem is completely free of treatment, as confirmed by its accompanying GRS report
  • Diamonds totaling approximately 1.00 carat further enhance the design
  • Set in platinum
  • Get complete item description here
$50,000
Item No. 32-2376

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Description
This exceptional ring is centered by a cushion cut cobalt spinel weighing an impressive 5.23 carats. The gem is entirely untreated, as confirmed by its accompanying GRS report, and displays a remarkably saturated cobalt-blue hue—among the rarest and most sought-after colors in spinel. Diamonds totaling approximately 1.00 carat further enhance the design, adding brilliance along the band. Set in platinum.

Long admired for their vivid color and captivating luster, spinels have historically been mistaken. . .
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This exceptional ring is centered by a cushion cut cobalt spinel weighing an impressive 5.23 carats. The gem is entirely untreated, as confirmed by its accompanying GRS report, and displays a remarkably saturated cobalt-blue hue—among the rarest and most sought-after colors in spinel. Diamonds totaling approximately 1.00 carat further enhance the design, adding brilliance along the band. Set in platinum.

Long admired for their vivid color and captivating luster, spinels have historically been mistaken for rubies and sapphires, even appearing in some of the world’s most important crown jewels—earning them the enduring nickname of the “imposter gem.” Once overlooked, fine spinel has risen dramatically in prominence, with untreated specimens such as this now regarded among the most coveted of all colored gemstones for collectors.

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Cobalt Spinel Ring, Untreated, 5.23 Carats
Period: Contemporary
Type: Rings
Style: Modern
Stones: Diamonds;Spinel
Blue is the Rarest Color: How Blue Went from an Ancient Luxury to Essential
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Everything You Need to Know About The ‘Imposter’ Spinel Gemstone
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Buy with Confidence

At M.S. Rau, we are committed to building a long-term, rewarding relationship with each and every client. That’s why your purchase is backed by our 125% guarantee.

Learn More

The M.S. Rau Difference

The M.S. Rau Difference

The M.S. Rau Difference

Our philosophy has always been to offer clients only the very finest antiques, works of art and jewelry, and to back every transaction with the highest level of customer service. Earning your trust and delivering only the very best pieces is our top priority.

-Bill Rau, Third-Generation Owner

Fine Art

M.S. Rau is committed to offering fine art of the highest caliber and we seek paintings and sculpture by historically renowned artists, often with impressive provenance. The large majority of our works of art come from private. . .

M.S. Rau is committed to offering fine art of the highest caliber and we seek paintings and sculpture by historically renowned artists, often with impressive provenance. The large majority of our works of art come from private collections; many are fresh to the market. Founded on Bill Rau’s expertise in the field, our specialisms range from Old Master pictures to Modern Art masterpieces. We regularly exhibit Dutch, Flemish, and Italian Old Masters, Academic, Orientalist, Barbizon, Impressionist, Post-Impressionist, Maritime & Sporting, British Neoclassical and American Illustration.

Our experienced fine art consultants offer personalized and confidential fine art consultation services to all clients. Whether you are looking to begin collecting art, grow an existing collection, or redefine your collecting strategy, M.S. Rau can support you on this journey.

Jewelry

For more than a century, M.S. Rau has offered clients a superb selection of the highest quality jewelry. From the rarest colored diamonds, to the most sublime gemstones, to the most exquisite designer jewelry, M.S. Rau houses. . .

For more than a century, M.S. Rau has offered clients a superb selection of the highest quality jewelry. From the rarest colored diamonds, to the most sublime gemstones, to the most exquisite designer jewelry, M.S. Rau houses an extraordinary collection of fine jewels to satisfy the most discerning collector. Stunning creations by Tiffany & Co., Cartier, Van Cleef & Arpels, Harry Winston and Patek Philippe are offered alongside extreme rarities such as vivid yellow, pink and blue diamonds, coveted Burma and Kashmir sapphires and elusive Golconda diamonds prized for their fire and perfection. Iconic jewels from the Art Deco, Edwardian, Art Nouveau and Victorian periods round out the collection.

Antiques

Since 1912, M.S. Rau has been recognized as a leader in the antiques industry and today our collections of rare silver, furniture, clocks, porcelain, glass and objets d'art are second to none. Our commitment to curating the. . .

Since 1912, M.S. Rau has been recognized as a leader in the antiques industry and today our collections of rare silver, furniture, clocks, porcelain, glass and objets d'art are second to none. Our commitment to curating the world’s most extraordinary and beautiful treasures has remained steadfast and our acquisition philosophy is simple: seek out and acquire only the very finest works whose provenance, beauty and rarity set them apart from all others. Our clients can be certain that each and every piece in our gallery has been hand-selected and carefully vetted for authenticity, condition and provenance. And, because our network of contacts spans generations, we are often able to acquire pieces that may have otherwise never been available on the market.

Whether you are just starting your collection, adding to an existing collection or even decorating your home, our team’s knowledge and experience can assist you in your endeavor. We have services and procedures in place to make your acquisition process both enjoyable and efficient.