• 5.11 carat unheated Thai green sapphire oval cut gemstone face up view - Shiraz Jewelry
  • Lab certificate confirming 5.11ct natural unheated Thai green sapphire authenticity
  • Macro facet detail of clean 5.11ct natural untreated green sapphire with olive fire
  • Side profile view showing girdle thickness and pavilion depth of 5.11ct oval sapphire
  • Vibrant 5.11ct unheated Thai green sapphire gemstone shown in natural sunlight
  • Custom solitaire engagement ring design mockup featuring 5.11ct oval green sapphire
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Shiraz Jewelry

5.11 Carat Natural Unheated Thai Green Sapphire

5.11 Carat Natural Unheated Thai Green Sapphire

฿97,000.00 THB
฿97,000.00 THB
Sale Sold out

An extraordinary collector-grade gem featuring a rare 5.11-carat weight, 100% natural unheated purity, and vivid olive-green brilliance.

Sourced from the historic sapphire fields of Thailand, this gemstone showcases a luminous green hue with captivating olive and golden undertones.

Unlike the vast majority of sapphires on the market today, this stone is completely unheated and untreated, preserving its natural origin and untouched beauty. Its masterfully proportioned oval cut gives it outstanding light return and scintillation across every facet. Remarkably clean with high clarity, this 5.11ct gem makes an impressive center stone for a modern engagement ring or an elegant heirloom pendant.

Gemstone Specifications:

  • Gem Type: Natural Sapphire (Corundum)
  • Carat Weight: 5.11 ct
  • Color: Rich Thai Green / Olive Green
  • Cut / Shape: Faceted Oval Cut
  • Treatment: 100% Unheated & Untreated (Natural)
  • Clarity: Clean / High Transparency
  • Origin: Thailand
  • Certification: Fully Certified (Lab Certificate Included)
  • Hardness: 9 on Mohs Scale (Ideal for everyday wear)

Key Features & Highlights

  • 100% Natural & Unheated: Free from heat treatment, ensuring maximum rarity, natural authenticity, and long-term value.
  • Substantial 5.11 Ct Scale: A commanding size that offers incredible presence as a centerpiece in custom jewelry.
  • Exceptional Precision Faceting: Cut to maximize fire, brilliance, and color saturation in natural daylight or evening light.
  • Full Gemological Certification: Comes with an independent lab certificate confirming authenticity and unheated status.
  • Durable for Daily Wear: With a Mohs hardness second only to diamond, sapphires are exceptionally resistant to scratching and wear.

Custom Jewelry Ideas

  • Alternative Engagement Ring: Mount this oval gem in an 18K yellow gold or platinum setting—accented by tapered baguette diamonds or a delicate halo—for a unique, durable engagement ring.
  • Statement Pendant: Frame it in a clean solitaire or diamond-paved bezel setting to create an eye-catching luxury necklace.

Details

Make:

Metal:

Gemstone: Green Sapphire

Gender:

Color:

Age:

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 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