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- Regular price
- $8,300.00
Blue Sapphire Diamond Ring
- Regular price
- $8,300.00
Find Your Perfect Fit
A guide to accurate ring sizing and diamond proportions.
1. Ring Size Conversion Chart
We use the standard Australian/UK (Alphabetical) sizing system. Use the table below to find your match based on your diameter or circumference.
| Inside Diameter (mm) | Inside Circumference (mm) | AU / UK Size | US / Canada Size |
|---|---|---|---|
| 14.1 mm | 44.2 mm | F | 3 |
| 14.9 mm | 46.8 mm | H | 4 |
| 15.7 mm | 49.3 mm | J ½ | 5 |
| 16.5 mm | 51.9 mm | L ½ | 6 |
| 17.3 mm | 54.4 mm | N ½ | 7 |
| 18.1 mm | 57.0 mm | P ½ | 8 |
| 18.9 mm | 59.5 mm | R ½ | 9 |
Includes printable ruler and physical sizing circles.
2. Stone Size: mm vs. Carat Weight
Diamond carat weight measures mass, while millimeter (mm) measures physical dimensions. Use this as a visual reference for Round Brilliant cut stones.
| Carat Weight (ct) | Round Diameter (mm) | Style Guide |
|---|---|---|
| 0.25 ct | 4.1 mm | Subtle & Minimalist |
| 0.50 ct | 5.2 mm | The Classic Choice |
| 1.00 ct | 6.5 mm | Timeless Brilliance |
| 1.50 ct | 7.4 mm | Commanding Presence |
| 2.00 ct | 8.1 mm | Luxury Statement |
Professional Measurement Tips
Temperature: Fingers shrink in the cold and swell in the heat. Measure at the end of the day when your hands are warm.
Band Width: Wider bands feel tighter on the finger. If you are choosing a wide eternity band, we recommend ordering one half-size larger.
Between Sizes: If you fall between two sizes, always opt for the larger size to ensure a comfortable fit.
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files/LR14050-10-png.webp
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files/LR14050-11-png.webp
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files/LR14050-7-png.webp
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files/LR14050-8-png.webp
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files/LR14050-6-png.webp
Blue Sapphire Diamond Ring
- Regular price
- $8,300.00
The Blue Sapphire Diamond Ring is a blue sapphire engagement ring handcrafted in our Northern Rivers studio. A 7 x 5mm oval natural sapphire centre stone, set in ethical solid gold sourced exclusively from ABC Refinery, Australia's only independent refiner with simultaneous LBMA, SGE, and CME COMEX accreditation.
Made to order by Australian goldsmiths. Our founder is a member of the Università degli Orefici (est. 1508, Rome), bringing 500 years of Italian goldsmithing tradition to each ring. Looking at other Lucano engagement rings? See the Halo Lumina Oval Solitaire or the Imperia Emerald Solitaire.
Why the Blue Sapphire Diamond Ring
- Natural blue sapphire centre: 7 x 5mm oval natural sapphire, set in solid gold. Sapphire is the second-hardest natural gemstone (9 on the Mohs scale), prized for durability and rich colour.
- Ethical gold sourcing: gold sourced exclusively from ABC Refinery, Australia's only independent refiner with LBMA, SGE, and CME COMEX accreditation.
- Italian goldsmith heritage: our founder is a member of the Università degli Orefici (est. 1508, Rome), bringing 500 years of Italian goldsmithing tradition to each piece.
- Handcrafted in Australia: hand-made to order in our Northern Rivers studio.
- Lifetime craftsmanship warranty: covers the workmanship of every Lucano ring for life. Free shipping Australia-wide.
Specs and details
- Centre stone: 7 x 5mm oval natural sapphire
- Metal: ethical solid gold
- Origin: Northern Rivers studio, Australia, hand-made to order
- Gold sourcing: ABC Refinery (LBMA, SGE, CME COMEX accredited)
- Lead time: 4 to 6 weeks
Frequently asked questions
What is a blue sapphire engagement ring?
A blue sapphire engagement ring uses a natural sapphire as the centre stone instead of a diamond. Blue sapphire is the most traditional colour, prized for its durability (9 on the Mohs scale, second only to diamond) and rich blue hue. Princess Diana's engagement ring, now worn by Catherine, Princess of Wales, is one of the most famous blue sapphire engagement rings.
Is the sapphire natural or lab-grown?
The centre stone in this ring is a natural sapphire, mined and cut, not lab-grown.
How is the gold sourced?
We source our gold exclusively from ABC Refinery, Australia's only independent refiner with simultaneous accreditation from the London Bullion Market Association (LBMA), Shanghai Gold Exchange (SGE), and CME Group COMEX.
How durable is sapphire compared to diamond?
Sapphire ranks 9 on the Mohs hardness scale, second only to diamond at 10. It is one of the most durable gemstones suitable for daily-wear engagement rings.
How long does it take to make?
Each Blue Sapphire Diamond Ring is hand-made to order in our Northern Rivers studio. Lead times typically run 4 to 6 weeks. Free shipping Australia-wide once dispatched, with Lucano's lifetime craftsmanship warranty.
Total Diamond Weight: 1.66 ct