Natural Blue Sapphire 0.57ct Untreated Octagon Cut Australia
€17.90 EURSKU: sa659-3
Taxes included. Shipping calculated at checkout.
- Secure Payment
- Real Photos
- Fast Delivery
Free shipping over €50
This Australian octagon-cut blue sapphire displays the deep, rich teal-blue color for which Australian sapphires are internationally recognized — a strongly saturated cool blue with a characteristic blue-green-gray undertone that immediately sets it apart from sapphires of other origins. The step-cut octagon faceting delivers clean, crisp planes that reflect the stone's dark color with commanding depth and quiet authority. An authentic Australian blue at an accessible price.
Australia is one of the world's most significant sapphire-producing nations, with stones from Queensland and New South Wales prized for their distinctive deep blue-teal-gray color signature. This stone is entirely untreated, preserving the rich natural character of Australian corundum without heat enhancement — a key attribute for collectors who value provenance and natural gem purity. At 0.57ct in a 5.3x3.7mm octagon, it is a well-proportioned accent stone for rings and pendants where Australian character is valued.
Natural Australian blue sapphire, September birthstone - sold loose.
We ship worldwide from Sofia, Bulgaria. Every order is packed in a protective box with bubble wrap. Orders within Bulgaria are dispatched within 1-2 business days and international orders within 2-3 business days. Free shipping is applied automatically at checkout, and the threshold applies to the order value after any discounts.
Delivery within Bulgaria
- Delivered by Speedy, Econt or Box Now, to a courier office, a locker or your address.
- Fixed prices: Box Now locker €1.60 (free on orders from €25), Speedy office €3.20, Econt office or locker €4.00, Speedy to your address €4.50.
- Free shipping on orders over €50, with any courier and at any weight.
- Cash on delivery is available.
- Delivery normally takes 1-2 business days after dispatch.
- Hardness
- 9
- Cleavage
- None
- Durability
- Excellent
- Soapy water
- Safe
- Ultrasonic
- Usually safe
- Steam
- Usually safe
About sapphire
Sapphire is corundum in every color except red. At 9 on the Mohs scale it is second only to diamond, and it is also very tough with no cleavage, so it rarely chips or splits when knocked. Together that makes it one of the most durable gemstones for everyday wear, rings included.
Cleaning
Warm water, a drop of mild dish soap and a soft toothbrush are all you need. Brush behind the stone too, where dust and skin oils collect, then rinse and dry with a soft cloth. Ultrasonic and steam cleaners are usually fine for a faceted sapphire, but skip them if the stone has fissures that reach the surface.
Wear and storage
Sapphire is very hard, so it can scratch softer gemstones stored with it. Only diamond can scratch it, so keep it apart from diamonds and store it on its own in a gem jar or a soft pouch.
For your jeweler
This sapphire is untreated. Sapphire handles normal setting, re-tipping and polishing well. If the stone has fissures that reach the surface, keep it out of direct torch flame and acid pickle.
Scale
True to scale: 5.3 × 3.7 mm
Shown next to a €1 coin (23.25 mm) in the exact ratio, so you can picture the real size.
