Round Brilliant Trilogy Diamond Ring Platinum RT12
Price range: $5,100 through $7,300
Our Round Brilliant Trilogy Diamond Ring RT12 in luxurious Platinum features milgrain beading and engraving for a vintage look. This stunning ring style is pictured with (1x) 0.50ct Round Brilliant Diamond in the centre and (2x) 0.25ct Round Brilliant Diamonds on the side (1.00 carat total). The RT12 is priced using Natural Diamonds in H colour, Si clarity, and 1.00 carat total weight. Select Lab-Grown Diamonds in F colour and VS clarity for an economical option. Visit a Polished Diamonds Shop or contact us for information and friendly advice.
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Description
More Information – RT12 Round Brilliant Cut Platinum
This Round Brilliant Trilogy Diamond Ring RT12 in luxurious Platinum is an exquisite design that showcases three brilliant-cut diamonds held by detailed claw settings. The band features beautiful engraved accents on the shoulders and classic milgrain detailing along the edges, giving it a sophisticated, antique aesthetic. The price for the Trilogy Ring RT12 includes (1x) 0.50ct & (2x) 0.25ct Natural Diamonds, H colour, Si clarity. Select Lab-Grown Diamonds at F colour, VS clarity for an economical but high-quality option. Select your precious metal: Yellow, Rose, White Gold or Platinum. Contact our friendly team for other options and friendly advice.
Customise Your RT12 Diamond Ring
Handcrafted to the highest standards, this elegant ring makes a meaningful statement and can be customised to suit your love story, budget, and style. Design your ring with the RT12’s fully customisable features:
- Available in precious metal combinations of Platinum, Palladium, 18kt, 14kt, 10kt and 9kt Yellow Gold, White Gold and Rose Gold.
- Available in various diamond shapes. These include Round Brilliant, Princess, Radiant, Oval, Emerald, Pear, Marquise, Cushion, and Asscher Cut diamonds.
- We also supply Sapphires, Rubies, Emeralds and many other precious gemstone varieties.
Crafted with Precision in New Zealand
Every ring is individually made using advanced technology and expert craftsmanship:
- 3D CAD Design for custom previews
- Wax-prototype casting for accuracy
- MRI laser scanning + Rhino CAD for perfect symmetry
- Hand-finished for quality, comfort, and exceptional workmanship
- Designed to align seamlessly with future wedding or eternity bands
Start Your Custom Ring Today
Elevate your jewellery collection with a stunning Trilogy Diamond Ring RT12 in luxurious Platinum, custom-made to your exact specifications. Contact Polished Diamonds or visit one of our showrooms to begin your bespoke design journey.
Why Choose Polished Diamonds
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Auckland Showroom
95C Ponsonby Road,
Grey Lynn
Auckland 1011
Wellington Showroom
42 Lady Elizabeth Lane,
Waterfront – CBD
Wellington 6011
Christchurch Showroom
30 New Regent Street,
Christchurch CBD,
Christchurch 8011
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she’ll never take off.
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In-store and virtual appointments with our jewellery specialists
Lifetime Warranty
Every piece is backed by our comprehensive lifetime guarantee
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Flexible finance available — speak with us in studio to find the right option
Certified Diamonds
GIA and IGI certified stones with full quality documentation


















