Natural greenish blue sapphire weighing 1.25 carats, featuring a radiant cut, greenish blue colour and heat treatment. Offered as a loose gemstone for custom engagement rings, pendants and bespoke jewellery designs, complete with certification from an authorised gemologist.
This natural greenish blue sapphire displays an attractive blend of blue and green tones, giving it a distinctive appearance while maintaining the durability and elegance associated with natural sapphire. Sold as a loose gemstone, it provides flexibility for custom jewellery projects including engagement rings, pendants and personalised designs.
Quick Summary
- Natural greenish blue sapphire
- Weight: 1.25 carats
- Radiant cut loose gemstone
- Colour: Greenish Blue
- Treatment: Heat Treated
- Birthstone: September
- Mohs Hardness: 9
- Gemologist certificate included
The radiant cut combines brilliant-style faceting with elegant geometric lines, enhancing light return and colour distribution. Sapphire belongs to the corundum family and ranks 9 on the Mohs hardness scale, making it suitable for jewellery intended for regular wear when professionally set.
As the September birthstone, sapphire has traditionally been associated with wisdom, sincerity and loyalty. Its durability and timeless appeal make it a popular choice for engagement rings, heirloom jewellery and custom fine jewellery.
Gemstone Specifications
- Identification: Natural Sapphire
- Species: Natural Corundum
- Variety: Greenish Blue Sapphire
- Shape & Cut: Radiant Cut
- Weight: 1.25 Carats
- Colour: Greenish Blue
- Measurements: 4.90 × 6.60 × 3.70 mm
- Treatment: Heat Treated
- Birthstone: September
- Sold As: Loose Gemstone (Unset)
Certification & Authenticity
This sapphire includes a certificate issued by an authorised gemologist confirming gemstone identification and disclosed treatment information.
Seller Notes: A natural crystal inclusion is visible under magnification. Such internal characteristics are commonly found in natural earth-mined sapphires and are consistent with natural gemstone formation.
Jewellery Applications
This listing is for a loose gemstone only and does not include a finished jewellery setting.
Suitable for:
- Custom engagement rings
- Radiant cut solitaire rings
- Halo ring designs
- Pendants and necklaces
- Fine bespoke jewellery
- September birthstone jewellery
- Gemstone collections
Custom jewellery services are available in yellow gold, white gold, rose gold, silver and platinum settings.
Why Choose This Gemstone?
Radiant cut sapphires combine excellent brilliance with clean geometric symmetry, making them suitable for both classic and contemporary jewellery styles. The natural blend of green and blue tones gives this gemstone a distinctive appearance while retaining the durability and versatility for which sapphires are recognised.
Explore Related Collections
Browse related collections and educational resources:
- Blue Green & Teal Sapphire Collection
- Natural Sapphire Collection
- All Loose Sapphire Gemstones
- Custom & Ready-to-Wear Sapphire Jewellery
- Gemstone Education Articles
Shipping & Returns
Worldwide shipping is available with tracking. Buyers are responsible for any applicable customs duties or import taxes.
Returns are accepted within 15 days of delivery provided the gemstone is returned unused and in its original condition according to our published return policy.
Frequently Asked Questions
Is this a natural greenish blue sapphire?
Yes. This gemstone is identified as a natural sapphire and is not synthetic or laboratory created.
Has this sapphire been treated?
Yes. This gemstone has undergone heat treatment, which is disclosed in the product specifications and gemologist certificate.
Is this sold as a finished ring?
No. This listing is for a loose gemstone only. Custom jewellery settings are available separately.
Is a radiant cut sapphire suitable for an engagement ring?
Yes. The radiant cut offers excellent brilliance and durability, making it a popular choice for custom engagement ring designs.
Will the gemstone colour vary under different lighting?
Natural sapphires may display subtle colour differences under daylight, indoor lighting and studio lighting. This is a normal characteristic of natural coloured gemstones.








