3 Carat Round Solitaire Lab Grown Diamond Engagement Ring
Measure at home with confidence — printable sizer or your existing ring.
How to measure
Use an existing ring
Match the inside of your ring to the closest circle on the printable guide. The circle should sit inside the ring with minimal white showing.
Use the finger sizer strip
Print at 100% scale on US Letter. Cut out the strip, cut the slit, wrap it around your finger with numbers visible, and read the number closest to the opening. Slide it over your knuckle and choose a size that feels comfortable.
Quick fit tips
- Measure at the end of the day (fingers are slightly larger).
- Avoid measuring when hands are cold.
- If you’re between sizes, go up for comfort.
- Wide bands can feel tighter — consider +0.5 size.
Ring Size Chart (AU/UK)
Measurements shown in diameter and circumference.
| AU/UK Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| H 1/2 | 15.0 | 47.1 |
| J 1/2 | 15.8 | 49.6 |
| L 1/2 | 16.5 | 51.8 |
| N 1/2 | 17.2 | 54.0 |
| O 1/2 | 17.9 | 56.2 |
| Q 1/2 | 18.5 | 58.1 |
| R 1/2 | 19.1 | 60.0 |
| T 1/2 | 19.8 | 62.2 |
| U 1/2 | 20.3 | 63.8 |
| W 1/2 | 21.0 | 66.0 |
| X | 21.6 | 67.9 |
| Z | 22.3 | 70.1 |
FAQ
What if I’m buying a surprise gift?
If you can borrow one of their rings, measure the inside diameter. If unsure, pick a common size and we can guide resizing later.
Should I size up for thicker bands?
Often yes — thicker bands feel tighter. If you’re near the top end of a size, go up by 0.5.
Can you help me confirm my size?
Yes — send us your measurement (mm) or a photo of the printed sizer on your finger and we’ll confirm.
- Free Resizing
- Lifetime Warranty
- Free Ring Customisation*
- Free Insured Shipping on all orders
Round Solitaire Engagement Ring
VVS2 • D Colour • Excellent Make — 3.00ct
Lab-grown diamond D VVS2, Excellent cut, IGI-certified shown in solitaire setting
- Center Carat: 3.00ct
- Clarity: VVS2 (exceptional purity)
- Colour: D (colourless)
- Certificate: IGI
- Side Diamonds: N/A
- Metal: 18K Gold or Platinum
- Lead time: ~3–4 weeks, made-to-order
3 Carat Round Solitaire Lab Grown Diamond Engagement Ring
The 3 Carat Round Solitaire Lab Grown Diamond Engagement Ring by Raphana Jewellery is the ultimate expression of timeless elegance and refined luxury. Designed to showcase the unmatched brilliance of a round cut diamond, this classic solitaire setting allows the centre stone to take full focus.
Featuring a stunning 3 carat round lab grown diamond, this ring delivers exceptional fire, brilliance, and presence. The round brilliant cut is renowned for its superior light performance, making it the most sought-after diamond shape for engagement rings.
Available in 18K white gold, yellow gold, rose gold, or platinum, this solitaire engagement ring is crafted to suit your personal style while maintaining a clean, minimal, and luxurious aesthetic.
Why Choose a Solitaire Engagement Ring?
The solitaire setting is a timeless choice that highlights the beauty of a single diamond. Its minimal design ensures all attention is on the centre stone, making it ideal for showcasing a larger carat weight diamond.
- Classic and timeless design
- Maximum focus on the centre diamond
- Elegant and minimal aesthetic
- Perfect for everyday wear
The Brilliance of Round Cut Diamonds
Round diamonds are engineered for maximum sparkle, featuring precise faceting that reflects light beautifully. A 3 carat round diamond engagement ring offers unmatched brilliance and a bold yet sophisticated presence on the hand.
- Highest level of brilliance and fire
- Perfectly symmetrical cut
- Timeless and universally loved shape
- Ideal for solitaire settings
Lab Grown Diamonds – Modern Luxury
Lab grown diamonds are chemically, physically, and optically identical to natural diamonds, offering the same brilliance and durability. They provide a more sustainable and accessible option for those seeking larger carat sizes without compromise.
Each diamond is independently certified by leading gemological laboratories such as IGI or GIA, ensuring exceptional quality and authenticity.
- Identical to natural diamonds
- Ethically produced
- Excellent value for larger diamonds
- Certified for quality assurance
Ring Specifications
- Centre Stone: Round Lab Grown Diamond
- Total Carat Weight: 3 Carats
- Diamond Colour: D–F
- Diamond Clarity: VS or higher
- Certification: IGI / GIA
- Metal Options: 18K White Gold, 18K Yellow Gold, 18K Rose Gold, Platinum
- Setting Style: Solitaire
Crafted by Raphana Jewellery
At Raphana Jewellery, each engagement ring is crafted with precision and attention to detail by experienced jewellers. Designed to last a lifetime, every piece reflects a commitment to quality, luxury, and timeless design.
This ring is made to order, allowing you to customise your preferred metal, diamond quality, and proportions to create a truly personal piece.
Custom Engagement Rings
Looking to personalise your ring? Our team can help you customise this round solitaire engagement ring to suit your vision — from adjusting band width to selecting your ideal diamond specifications.
For custom designs or to explore options, contact our team or book a consultation with Raphana Jewellery.
Frequently Asked Questions
Is a 3 carat round diamond too large?
A 3 carat diamond offers a bold and luxurious look, making it a standout choice while still maintaining elegance in a solitaire setting.
Why is the round cut the most popular?
Round diamonds provide the highest level of brilliance due to their precise faceting, making them the most popular choice for engagement rings worldwide.
Order this piece online today! Crafted with care, it takes 6 weeks to create. Need it sooner or want a personal touch? Contact us—we’re happy to make it perfect for you!
