# Natural Blue Sapphire 2.12 Ct Oval Cut Loose Gemstone | Sky Blue Heat Treated September Birthstone

**Natural Blue Sapphire weighing 2.12 carats, featuring an oval cut, sky-blue colour and heat treatment. Offered as a loose gemstone for custom jewellery and supplied with certification from an authorised gemmologist.**

This natural blue sapphire displays an attractive sky-blue colour and weighs 2.12 carats. Its oval cut offers a balanced shape with excellent versatility for custom engagement rings, pendants, and bespoke jewellery designs. Sold as a loose gemstone, it allows complete flexibility when creating a personalised jewellery piece.

### Quick Summary

-   **Gemstone:** Natural Blue Sapphire
-   **Weight:** 2.12 Carat
-   **Shape:** Oval Cut
-   **Colour:** Sky Blue
-   **Treatment:** Heat Treated
-   **Birthstone:** September
-   **Certification:** Included

Blue sapphire is a variety of natural corundum valued for its durability, colour stability, and suitability for 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 enduring popularity has made it a preferred gemstone for engagement rings, anniversary jewellery, and heirloom-inspired designs.

### Gemstone Specifications

-   **Gemstone:** Natural Sapphire
-   **Species:** Natural Corundum
-   **Variety:** Blue Sapphire
-   **Shape / Cut:** Oval
-   **Weight:** 2.12 Carat
-   **Colour:** Sky Blue
-   **Measurements:** 8.50 × 5.25 × 5.30 mm
-   **Treatment:** Heat Treated
-   **Birthstone:** September
-   **Hardness:** 9 (Mohs Scale)

### Certification & Authenticity

This sapphire is supplied with certification from an authorised gemmologist confirming its identity as a natural blue sapphire and disclosing treatment information.

**Seller Notes:** The gemstone is described by the seller as a clean stone. Natural gemstones may contain internal characteristics that are consistent with natural formation.

### Jewellery Applications

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

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

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

### Why Choose This Sapphire?

Natural blue sapphires are valued for their combination of durability, timeless appearance, and versatility. The oval cut offers an elegant shape that complements a wide variety of jewellery styles while maximising visual presence.

### Explore Related Collections

Browse related selections and educational resources: [Blue Sapphire Collection](https://www.nashgems.com/collections/blue-sapphire-gemstones) | [Natural Sapphire Collection](https://www.nashgems.com/collections) | [All Gemstones](https://www.nashgems.com/collections/all) | [Ready-to-Wear Jewellery](https://www.nashgems.com/collections/sapphire-gemstone-jewelry-rings) | [Contact Us](https://www.nashgems.com/pages/contact) | [Gemstone Education Articles](https://www.nashgems.com/blogs/gemstone-articles)

### Shipping & Returns

Worldwide shipping is available. 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 sapphire include certification?

Yes. Certification from an authorised gemmologist is included.

#### Can this gemstone be used in an engagement ring?

Yes. Its durability and oval 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.

## Details

- **Price:** 1500.0 USD
- **Vendor:** NASHGEMS
- **Type:** blue Sapphire
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## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1500.00 USD | In stock |

## Images

- Natural blue sapphire oval cut 2.12 ct. heat-treated loose gemstone for rings, engagement jewelry, or pendants.
- Natural blue sapphire oval cut 2.12 carat loose gemstone from NASHGEMS for custom rings, engagement jewelry, or pendants.
- Natural blue sapphire oval cut 2.12 carat loose gemstone from NASHGEMS, ideal for custom rings or pendants.
- Natural blue sapphire oval cut 2.12 ct. heat-treated loose gemstone for custom rings, engagement jewelry, or pendants.
- Natural blue sapphire oval cut 2.12 ct. heat-treated loose gemstone for custom rings, engagement rings, or pendants.
- Oval cut natural blue sapphire gemstone, 2.12 carats, heat treated, from NASHGEMS, suitable for rings or pendants.
- Natural blue sapphire oval cut 2.12 ct. heat-treated loose gemstone for custom rings or pendants, showcasing vibrant blue color and clarity.
- Natural blue sapphire oval cut 2.12 crt loose gemstone by NASHGEMS, ideal for custom rings, engagement, or pendants.
- Natural blue sapphire oval cut loose gemstone, 2.12 carats, heat treated, ideal for custom rings, engagement, or pendants.

## Additional Information

- **Google: Custom Product:** Yes
- **Carat:** 2.12
- **Stone Shape:** Oval
- **Treatment:** Heat Treated

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> Source: [NASHGEMS](https://www.nashgems.com/products/natural-blue-sapphire-oval-cut-2-12-crt)
> Updated: 2026-07-16