• 3.95 carat blue spinel cushion cut loose gemstone deep midnight blue
  • natural blue spinel 3.95 ct cushion shape dark steel blue gemstone
  • close up of cushion cut blue spinel 3.95 carat with inclusions visible
  • premium dark blue spinel gemstone 3.95 carat for custom jewelry
  • loose blue spinel cushion cut 3.95 ct rich deep blue color gemstone
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Shiraz Jewelry

Shiraz Royal Midnight Blue Spinel – 3.95 Carat Cushion Cut

Shiraz Royal Midnight Blue Spinel – 3.95 Carat Cushion Cut

฿19,800.00 THB
฿19,800.00 THB
Sale Sold out

At Shiraz Jewelry, we specialize in gemstones with character, history, and long-term value—and this 3.95 carat natural blue spinel is a perfect example.

Cut in a beautifully balanced cushion shape, this gemstone displays a rich midnight blue tone with subtle steel-blue flashes, giving it a bold yet refined presence. Its darker saturation creates a sophisticated look that stands out from brighter, more common stones—ideal for collectors and clients seeking something truly distinctive.

Spinel has long been appreciated by connoisseurs for its natural beauty and rarity, often found untreated and valued for its brilliance and durability. With a hardness of 8 on the Mohs scale, this gem is well-suited for fine jewelry designed to be worn and enjoyed for generations.

This piece comes from our carefully curated collection, built over decades of experience in the gemstone trade. Stones like this—nearly 4 carats, well-cut, and rich in color—are increasingly difficult to source.

Gemstone Details

  • Gemstone: Natural Blue Spinel
  • Weight: 3.95 Carats
  • Shape: Cushion Cut
  • Color: Midnight Blue / Steel Blue
  • Clarity: Natural inclusions visible under magnification
  • Treatment: Untreated
  • Origin: Burma
  • Hardness: 8 (excellent durability)

Why This Stone Stands Out

  • Strong, masculine and elegant deep blue tone
  • Excellent size for a statement ring or pendant
  • Increasing rarity in today’s market
  • A unique alternative to sapphire with better value potential

Whether for a custom piece or as part of a growing gemstone collection, this spinel reflects the timeless quality and trust behind Shiraz Jewelry.

Details

Make:

Metal:

Gemstone: Spinel

Gender: Unisex

Color: Blue

Age: Adult

Shipping & Returns

Please refer to our Refund Policy

We ship internationally using registered service. Free shipping for total orders from items available online of min THB 35,000 via DHL/UPS.

Care Instructions

  • Clean with lukewarm water, mild soap, and a soft toothbrush.
  • Store separately to avoid scratches.
  • Avoid harsh chemicals, hand sanitizers, and perfumes.
  • Remove before swimming, working out, or gardening.
  • Avoid rapid temperature changes to protect the gemstone(s).
  • Have prongs checked annually by a professional jeweler.
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Engagement Rings - FAQ

What is the best gemstone for an engagement ring besides diamond?

Sapphire, especially unheated ones from Thailand, are a durable and beautiful alternative. They come in various colors including blue, green, and pink, and are ideal for daily wear.

What’s the difference between heated and unheated gemstones?

Heated stones have been enhanced for color, which is common. Unheated stones are rarer and considered more valuable by collectors.

Is it okay to choose a colored gemstone for an engagement ring?

Absolutely! Many modern couples choose sapphires, spinels, or emeralds to express personality and style.

How do I know my ring size?

You can visit us in person or use a printable ring sizer. If it’s a surprise, try borrowing a ring they wear on their ring finger.

Can I customize my engagement ring?

Yes! We offer custom ring designs. You can choose the gemstone, setting, and style that suits your love story.

Gemstones - FAQ

Explore

  • What is an unheated green sapphire?

    It’s a natural sapphire that hasn’t undergone heat treatment to enhance color. It’s rare, collectible, and more valuable.

  • What gemstones is Thailand famous for?

    Thailand is especially known for sapphires (blue, green, yellow), rubies, spinel, zircon, and garnet. The Chanthaburi and Kanchanaburi regions are particularly famous for gem mining.

  • Are gemstones cheaper in Thailand?

    Often yes, because Thailand is close to gem sources and has lower cutting costs. But prices vary depending on the type, quality, and treatment of the stone.

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    Have you ever tried a Thai Green Sapphire? Look, it costs a fraction of the price of blue sapphires, and we have sourced the finest green sapphires from Thailand! With their unique hue and exceptional clarity, these gems are sure to add a touch of elegance to any jewelry collection. Read more about green sapphire