• Unheated Thai green blue sapphire 3.21 carat oval cut loose gemstone
  • Natural unheated green blue sapphire from Thailand oval cut
  • 3.21 ct untreated Thai sapphire green blue color close-up
  • Oval cut unheated sapphire loose gemstone for fine jewelry
  • Natural Thai green blue sapphire no heat treatment
  • High quality unheated sapphire oval cut 3.21 carats with certificate
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Shiraz Jewelry

Unheated Thai Green Blue Sapphire 3.21 Ct Natural Oval Cut - Loose Gemstone for Fine Jewelry

Unheated Thai Green Blue Sapphire 3.21 Ct Natural Oval Cut - Loose Gemstone for Fine Jewelry

฿51,000.00 THB
฿51,000.00 THB
Sale Sold out

This 3.21 carat unheated Thai green blue sapphire is a natural corundum gemstone featuring a refined oval cut that enhances brilliance and depth of color. Exhibiting an elegant blend of green and blue hues, this sapphire displays subtle color shifts under different lighting, a highly desirable trait among collectors and fine jewelry designers.

Sourced from Thailand, a region historically renowned for producing high-quality sapphires, this gemstone is completely unheated, meaning its color and clarity are entirely natural and untreated. Unheated sapphires are increasingly rare and sought after for their authenticity, long-term value, and collectible appeal.

The oval cut offers excellent light performance while providing versatility for custom jewelry designs, including engagement rings, cocktail rings, pendants, and heirloom pieces. With good transparency and balanced proportions, this gemstone is ideal for both contemporary and classic fine jewelry settings.

Gemstone Details

  • Gemstone: Natural Sapphire (Corundum)
  • Color: Green Blue (Teal Tone)
  • Weight: 3.21 Carats
  • Cut: Oval Cut
  • Treatment: Unheated / No Heat
  • Origin: Thailand
  • Clarity: Transparent (natural inclusions may be present)
  • Type: Loose Gemstone for Fine Jewelry

Why Choose an Unheated Thai Sapphire?

  • 100% natural color with no heat enhancement
  • Higher rarity and collector value
  • Ethical, traceable gemstone source
  • Ideal for bespoke and high-end jewelry

Details

Make:

Metal:

Gemstone: Sapphire

Gender: Unisex

Color: Green Blue

Age: Adults

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.
View full details

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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    Natural green sapphire ring with diamonds set in 18k white gold

    Have you tried a Thai Green Sapphire ?

    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