# Natural Blue Sapphire 0.81 Ct Emerald Cut Loose Gemstone | Unheated September Birthstone

**Natural Blue Sapphire weighing 0.81 carats, featuring an emerald cut, blue colour and unheated status. Offered as a loose gemstone for custom jewellery and supplied with certification from an authorised gemologist.**

This natural blue sapphire weighs 0.81 carats and displays an attractive blue colour in a classic emerald cut. Sold as a loose gemstone, it is suitable for custom engagement rings, pendants, and bespoke jewellery designs. Its balanced proportions and timeless appearance make it an appealing choice for buyers seeking a natural sapphire for jewellery or gemstone collections.

### Quick Summary

-   **Gemstone:** Natural Blue Sapphire
-   **Weight:** 0.81 Carat
-   **Shape:** Emerald Cut
-   **Colour:** Blue
-   **Treatment:** Unheated
-   **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. Ranking 9 on the Mohs hardness 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 makes it a recognised choice for engagement rings, personalised jewellery, and meaningful gifts.

### Gemstone Specifications

-   **Gemstone:** Natural Sapphire
-   **Species:** Natural Corundum
-   **Variety:** Blue Sapphire
-   **Shape / Cut:** Emerald Cut
-   **Weight:** 0.81 Carat
-   **Colour:** Blue
-   **Measurements:** 4.40 × 4.90 × 3.50 mm
-   **Treatment:** Unheated
-   **Birthstone:** September
-   **Sold As:** Loose Gemstone

### Certification & Authenticity

This sapphire includes a certificate from an authorised gemologist confirming its authenticity and natural origin.

**Seller Notes:** The gemstone is described by the seller as a clean stone. Natural gemstones may contain internal characteristics that are not always visible without magnification.

### Jewellery Applications

This gemstone is sold loose and is not supplied as a finished ring or 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 gold, rose gold, white gold, silver, and platinum settings.

### Why Choose This Sapphire?

Natural blue sapphires are valued for their durability, timeless appearance, and versatility. Their classic colour and suitability for everyday wear have made them one of the most recognised gemstones used in fine jewellery worldwide.

### 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 with tracking and insurance. Orders are dispatched from Sri Lanka. 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?

No. This sapphire is listed as untreated (unheated).

#### Does the gemstone include certification?

Yes. A certificate from an authorised gemologist is included.

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

Yes. Sapphire ranks 9 on the Mohs hardness scale and is widely used in 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:** 600.0 USD
- **Vendor:** NASHGEMS
- **Type:** blue Sapphire
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## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 600.00 USD | In stock |

## Images

- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 carat natural blue sapphire, September birthstone jewelry for women.
- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 ct natural blue sapphire, September birthstone jewelry for women.
- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 carat natural blue sapphire, September birthstone jewelry for women.
- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 carat natural blue sapphire September birthstone jewelry for women.
- Blue sapphire engagement ring featuring a 0.81 carat natural blue sapphire, crafted by NASHGEMS, September birthstone jewelry for women.
- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 crt natural blue sapphire, September birthstone jewelry for women.
- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 carat natural blue sapphire, September birthstone jewelry for women.
- Blue sapphire engagement ring featuring a 0.81 carat natural blue sapphire, September birthstone jewelry by NASHGEMS.
- Blue sapphire engagement ring by NASHGEMS featuring a 0.81 carat natural blue sapphire gemstone, September birthstone jewelry for women.

## Additional Information

- **Google: Custom Product:** Yes
- **Carat:** 0.81
- **Stone Shape:** Emerald
- **Treatment:** No Heat

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> Source: [NASHGEMS](https://www.nashgems.com/products/natural-blue-sapphire-0-81ct-emerald-cut-loose-gemstone)
> Updated: 2026-07-08