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Blue sapphire loose gemstone, 1.31 ct., from NASHGEMS, showcasing a vibrant, high-quality precious stone for engagement rings.
Blue sapphire gemstone from NASHGEMS, 1.31 ct. loose precious stone for engagement rings and jewelry.
Blue sapphire gemstone from NASHGEMS, 1.31 ct. loose precious stone for engagement rings, showcasing vibrant blue color and cut.
Blue Sapphire gemstone from NASHGEMS, 1.31 ct. loose birthstone for engagement rings, showcasing vibrant blue color and polished cut.
Blue sapphire gemstone from NASHGEMS, 1.31 ct. loose precious stone for engagement rings or jewelry making.
Blue sapphire gemstone from NASHGEMS, 1.31 ct., loose precious stone for engagement rings, vibrant and finely cut blue gemstone.
Blue sapphire gemstone from NASHGEMS, 1.31 ct. loose birthstone for engagement rings, showcasing vibrant blue color and cut details.
Blue sapphire gemstone for engagement ring, 1.31 ct loose gemstone by NASHGEMS, showcasing rich blue color and faceted cut.
Blue sapphire loose gemstone, 1.31 ct., from NASHGEMS, showcasing a vibrant and polished precious stone for engagement ring designs.

✔ Natural Gemstone
✔ Certified by Gemmologist
✔ Suitable for Engagement Rings
✔ Custom Ring Available

Collector Grade Natural Gemstone: No two sapphires are ever identical. Once this gemstone is sold, this exact piece will never return to our collection.

Want to make a custom ring with this sapphire? Contact us for design options.

Natural Blue Sapphire 1.31 Ct Cushion Cut Loose Gemstone | Sky Blue Heat Treated September Birthstone

One-of-a-Kind Natural Sapphire — Available Only Once

✔ Natural Earth-Mined
✔ Certified Gemstone
✔ Engagement Ring Ready
✔ Free Worldwide Shipping
✔ 15-Day Returns
Sale price$614.25 USD

Natural Blue Sapphire weighing 1.31 carats, featuring a cushion cut, pastel-to-sky blue colour and heat treatment. Offered as a loose gemstone for custom jewellery and supplied with certification from an authorised gemologist.

This natural blue sapphire weighs 1.31 carats and displays attractive pastel, sky-blue, and pale-blue tones. Its cushion cut combines soft curves with balanced proportions, making it suitable for custom engagement rings, pendants, and bespoke jewellery designs. Sold as a loose gemstone, it provides flexibility for buyers seeking a natural sapphire for jewellery projects or gemstone collections.

Quick Summary

  • Gemstone: Natural Blue Sapphire
  • Weight: 1.31 Carat
  • Shape: Cushion Cut
  • Colour: Pastel / Sky / Pale Blue
  • Treatment: Heat Treated
  • Clarity: VS
  • Birthstone: September
  • Certification: Included

Blue sapphire is a variety of natural corundum valued for its durability, colour stability, and long-standing use in fine jewellery. With a hardness of 9 on the Mohs scale, sapphire is suitable for jewellery intended for regular wear when professionally set.

As the birthstone for September, blue sapphire is traditionally associated with wisdom, loyalty, and sincerity. Its timeless appearance has made it a popular choice for engagement rings, personalised jewellery, and meaningful gifts.

Gemstone Specifications

  • Gemstone: Natural Sapphire
  • Species: Natural Corundum
  • Variety: Blue Sapphire
  • Shape / Cut: Cushion
  • Clarity: VS
  • Weight: 1.31 Carat
  • Colour: Pastel / Sky / Pale Blue
  • Measurements: 7.00 × 5.50 × 3.80 mm
  • Treatment: Heat Treated
  • Birthstone: September

Certification & Authenticity

This sapphire includes a certificate from an authorised gemologist confirming its identity as a natural sapphire and disclosing treatment information.

Seller Notes: Crystal dust inclusions are visible under magnification. These characteristics are commonly found in natural sapphires and are consistent with natural gemstone formation.

Jewellery Applications

This gemstone is sold loose and is not supplied as a finished ring or jewellery item. Suitable applications include:

  • Custom Engagement Rings
  • Alternative Wedding Rings
  • Solitaire Ring Designs
  • Pendants and Necklaces
  • September Birthstone Jewellery
  • Custom Fine Jewellery Projects
  • Gemstone Collections

Custom jewellery services are available using gold, rose gold, white gold, silver, platinum, and diamond-accented settings.

Why Choose This Gemstone?

Cushion-cut blue sapphires combine classic elegance with excellent versatility. Their soft shape, attractive colour, and durability make them suitable for both traditional and contemporary jewellery designs.

Explore Related Collections

Browse related selections and educational resources: Blue Sapphire Collection | Natural Sapphire Collection | All Gemstones | Ready-to-Wear Jewellery | Contact Us | Gemstone Education Articles

Shipping & Returns

Worldwide shipping is available with tracking and insurance. Buyers are responsible for any applicable customs duties or import taxes. Returns are accepted according to our published return policy.

Frequently Asked Questions

Is this a natural blue sapphire?

Yes. This gemstone is identified as a natural blue sapphire from the corundum family.

Has this sapphire been treated?

Yes. This sapphire has undergone heat treatment, which is disclosed in the specifications.

Does the gemstone include certification?

Yes. A certificate from an authorised gemologist is included.

Can this sapphire be used in an engagement ring?

Yes. Its durability and cushion cut make it suitable for custom engagement ring designs.

Is this sold as a loose gemstone?

Yes. The sapphire is sold loose and is not supplied as a finished jewellery item.

More information
Blue sapphire loose gemstone, 1.31 ct., from NASHGEMS, showcasing a vibrant, high-quality precious stone for engagement rings.
Natural Blue Sapphire 1.31 Ct Cushion Cut Loose Gemstone | Sky Blue Heat Treated September Birthstone Sale price$614.25 USD

💎 Not Sure Which Sapphire To Choose?

Get free expert guidance before you buy.
We can help you choose the ideal gemstone based on:

✔ Color preference
✔ Budget
✔ Ring design
✔ Natural vs heated sapphires
✔ Engagement ring suitability

📩 Get Free Sapphire Consultation


WHAT ARE NATURAL BLUE SAPPHIRES?

 

  • Natural blue sapphires are precious gemstones from the corundum family, valued for their stunning blue color ranging from light to deep royal blue. Each stone’s hue and saturation contribute to its beauty and rarity.

WHAT IS A CEYLON SAPPHIRES?

 

  • Ceylon sapphires refer to natural sapphires mined from Sri Lanka (formerly known as Ceylon). These gemstones are celebrated for their exceptional brilliance, clarity, and lighter yet vivid blue hues.
    Unlike darker sapphires from other regions, Ceylon sapphires have a luminous quality that allows light to pass beautifully through the stone, making them a favorite among collectors and fine jewelers worldwide.

WHAT IS A ROYAL BLUE SAPPHIRES?

 

  • A Royal Blue sapphire is known for its deep, velvety blue color — rich, intense, and evenly saturated. This luxurious hue is considered the “ideal blue” for fine jewelry and is often found in high-end gemstones from Sri Lanka, Kashmir or Myanmar (Burma)

  • Its regal tone symbolizes nobility, wisdom, and power — famously worn by royals, including Princess Diana’s iconic engagement ring.

WHAT ARE CORNFLOWER BLUE SAPPHIRES?

 

  • Cornflower Blue sapphires are prized for their soft, medium-light blue color with a slight violet undertone — reminiscent of the delicate cornflower blossom. These sapphires, especially from Kashmir and Sri Lanka, are treasured for their vivid yet soft tone, often described as “pure” blue without being too dark or pale.

  • Collectors value them for their gentle, romantic color balance — ideal for elegant, timeless jewelry.

WHAT ARE PALE BLUE SAPPHIRES?

 

  • Pale Blue sapphires display a lighter, icy blue tone that feels fresh and subtle. Though less saturated, these sapphires have an airy brilliance and are often chosen for minimalist jewelry or pastel-inspired engagement rings.

  • Their understated elegance makes them an affordable and graceful choice for those who prefer delicate hues over deep saturation.

WHAT ARE VIVID BLUE SAPPHIRES?

 

  • Vivid Blue sapphires showcase the most intense and lively blue tone within the sapphire spectrum. Their color is rich, electric, and full of energy, with superior light reflection and saturation.

  • Stones in this category are extremely rare, especially when combined with high clarity and size. They make stunning centerpieces for engagement rings and statement jewelry.

WHAT ARE NATURAL SAPPHIRES?

 

  • A Natural sapphire is a gemstone formed in the Earth over millions of years without any synthetic or lab-created processes. Many natural sapphires undergo gentle heating to enhance clarity or color — a common and accepted treatment in the gem trade.

  • At NashGems, we specialize in certified natural sapphires from ethical sources, ensuring each gemstone’s authenticity, traceability, and unmatched beauty.

ARE YOUR BLUE SAPPHIRES TREATED?

 

  • We provide full disclosure on any treatments. Many of our sapphires are heat-treated, a standard industry practice to enhance color and clarity, ensuring they look their best while maintaining durability.

WHAT MAKES BLUE SAPPHIRES VALUABLE?

 

  • Value is determined by color intensity, clarity, cut quality, carat weight, and origin. Kashmir and Burmese sapphires are particularly prized for their exceptional quality.

HOW DO I CARE FOR MY BLUE SAPPHIRE?

 

  • Clean with warm soapy water and a soft brush. Avoid harsh chemicals and store separately to prevent scratching other jewelry. Regular gentle care will preserve the sapphire’s brilliance for years.

DO YOU PROVIDE CERTIFICATES?

 

  • Yes! We can provide gemological certificates from reputable labs upon request, ensuring authenticity and giving you confidence in your purchase.

 

 

 

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