3.00ct Radiant Lab-Grown Diamond Ring, "The Starling"
- Free worldwide shipping
- Lifetime Warranty
- Free Stone Inlay® or Engraving
- Wholesale Direct Pricing
Bold brilliance meets architectural mastery in The Radiant Pavé Cathedral, a statement ring that commands attention from every angle. At its heart lies a 3.00ct Radiant Lab-Grown Diamond, framed by cathedral shoulders and a hidden halo that flood the stone with light. Thick gold walls anchor the design, while pavé diamonds cascade across the band, under-gallery, and even the prongs — a spectacle of fire that refuses to be ignored. Built on a chunky solid gold foundation, this ring is luxury engineered to last a lifetime.
Material
14K Gold / 18K Gold
Color
Yellow Gold
Main Stone
Diamond
Side/Accent Stones
Diamond
Band Width/Chain Thickness
Stone
Key Features
Luther's Signature Customization
Choose one, Free-of-charge.
For Stone Inlay®, all stones are priced at the same rate, except for diamonds, which have an additional $100 charge.
If you would like to add both a Stone Inlay® and Engraving, there will be an extra $50 charge.
To confirm your engraving or stone inlay, please kindly email us at luthersdiamonds@gmail.com with your order number.
💎 Diamond Quality Guarantee
“But wait — I don’t get to pick the exact stone?”
No worries — we make it simple.
How it works:
- Place your order.
- Within 24 hours, our team emails you the exact diamond video + IGI PDF certificate for your ring.
- You approve, and we set your stone.
The Luther’s Standard
Every diamond we select meets these guarantees:
- DEF Color (colorless brilliance)
- VS1+ Clarity (visually flawless to the naked eye)
- Excellent Cut (perfect sparkle, every time)
That’s how you know your ring is always top quality, even before you see the stone.
(Example of IGI certificate shown below — you’ll receive your own unique certificate and video after purchase.)
" Want a different size or material? "
Just let us know your preferred carat weight and metal, and our team will send you adirect wholesale quote.
Crafted to Last. Guaranteed.
Every Luther’s Diamonds ring is handcrafted in our Atlanta studio. We include a Lifetime Warranty for any manufacturing defect.
- Free accent stone replacement (under 0.10ct) if it falls out because of craftsmanship
- One free resizing within 100 days
- Annual care + prong check recommended
- Your ring also comes with a professional diamond appraisal for insurance protection.
Learn More →
Ring Size Guide
US & Canada Ring Sizes
| US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 3 | 14.1 | 44.2 |
| 3.5 | 14.5 | 45.5 |
| 4 | 14.9 | 46.8 |
| 4.5 | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.9 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.2 | 57.0 |
| 8.5 | 18.6 | 58.3 |
| 9 | 19.0 | 59.5 |
| 9.5 | 19.4 | 60.8 |
| 10 | 19.8 | 62.1 |
| 10.5 | 20.2 | 63.4 |
| 11 | 20.6 | 64.6 |
| 11.5 | 21.0 | 65.9 |
| 12 | 21.4 | 67.2 |
UK & Australia Ring Sizes
| UK Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| F | 14.1 | 44.2 |
| G | 14.5 | 45.5 |
| H | 14.9 | 46.8 |
| I | 15.3 | 48.0 |
| J | 15.7 | 49.3 |
| K | 16.1 | 50.6 |
| L | 16.5 | 51.9 |
| M | 16.9 | 53.1 |
| N | 17.3 | 54.4 |
| O | 17.7 | 55.7 |
| P | 18.2 | 57.0 |
| Q | 18.6 | 58.3 |
| R | 19.0 | 59.5 |
| S | 19.4 | 60.8 |
| T | 19.8 | 62.1 |
| U | 20.2 | 63.4 |
| V | 20.6 | 64.6 |
| W | 21.0 | 65.9 |
| X | 21.4 | 67.2 |
European Ring Sizes
| EU Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 44 | 14.1 | 44.2 |
| 45 | 14.5 | 45.5 |
| 46 | 14.9 | 46.8 |
| 48 | 15.3 | 48.0 |
| 49 | 15.7 | 49.3 |
| 50 | 16.1 | 50.6 |
| 52 | 16.5 | 51.9 |
| 53 | 16.9 | 53.1 |
| 54 | 17.3 | 54.4 |
| 56 | 17.7 | 55.7 |
| 57 | 18.2 | 57.0 |
| 58 | 18.6 | 58.3 |
| 60 | 19.0 | 59.5 |
| 61 | 19.4 | 60.8 |
| 62 | 19.8 | 62.1 |
| 63 | 20.2 | 63.4 |
| 65 | 20.6 | 64.6 |
| 66 | 21.0 | 65.9 |
| 67 | 21.4 | 67.2 |
Japanese Ring Sizes
| JP Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 4 | 14.5 | 45.5 |
| 5 | 14.9 | 46.8 |
| 6 | 15.3 | 48.0 |
| 7 | 15.7 | 49.3 |
| 8 | 16.1 | 50.6 |
| 9 | 16.5 | 51.9 |
| 10 | 16.9 | 53.1 |
| 11 | 17.3 | 54.4 |
| 12 | 17.7 | 55.7 |
| 13 | 18.2 | 57.0 |
| 14 | 18.6 | 58.3 |
| 15 | 19.0 | 59.5 |
| 16 | 19.4 | 60.8 |
| 17 | 19.8 | 62.1 |
| 18 | 20.2 | 63.4 |
| 19 | 20.6 | 64.6 |
| 20 | 21.0 | 65.9 |
| 21 | 21.4 | 67.2 |
Find Your Ring Size
Measure Your Finger
- Use a flexible measuring tape or length of string.
- Wrap it around the finger you'll wear your ring on. If you're creating a ring stack, consider where on your finger the ring will sit. If using string, mark the point on the string where the ends meet with a pen.
- Lay the string on a flat surface and use a ruler to measure the length (in inches or millimeters) up to the mark. Compare your measurement to the size chart to determine your ring size. If you are between sizes, opt for the larger size.
Measure an Existing Ring
- Choose a ring that already fits your finger well.
- Measure the interior diameter of the ring in millimeters (mm).
- Use the measurement chart to match the size of your ring to the closest size in mm. The interior of the ring should align with the outer edge of the circle.
Luther's At Your Service
There's no question too small or request too large for Luther's Diamonds client advisors. From choosing an engagement ring or gift to providing in-store or virtual appointments, we're always at your service.
