18K Solid Gold Lab-Grown Diamond Radiant Cut Halo Ring, 5-8 Carat

Quick facts: IGI certified · E colour / VVS2 clarity · 18K solid gold · 60-day free returns · Free worldwide DHL delivery
More: Lab Grown Diamond Rings · Lab Grown Diamond Jewelry · How to find your ring size
A radiant cut lab-grown diamond held in a four-prong basket, with a hidden halo tucked beneath the centre stone and pavé running along the band. Choose your centre stone from 5 to 8 carat. The halo sits out of sight from above, so the radiant cut reads clean from the front and catches light from every other angle.
Every centre stone is graded E colour and VVS2 clarity — colourless, with inclusions that take magnification to find — and comes IGI certified, with the certificate shipped alongside the ring.
Made to order in 18K solid gold: yellow, white or rose. Solid gold throughout, never plated.
Choose your carat:
5 Carat — $3,899
6 Carat — $4,699
7 Carat — $5,799
8 Carat — $7,299
Product Details:
Metal: 18K Solid Gold (Available in White, Rose and Yellow Gold)
Diamond: Lab-grown diamond, E colour, VVS2 clarity, 5.00ct to 8.00ct centre stone
Shape: Radiant
Setting: Four-prong basket with hidden halo and pavé band
Certifications: IGI Certified & BIS Hallmarked
Shipping Time: 4 business days to make and dispatch, plus about 4 business days in transit (around 8 business days total)
Customer Support: Available via live chat and video calls.
Frequently Asked Questions
How much does a large lab-grown diamond ring cost in solid gold?
At The Karat Store this ring runs from $3,899 for a 5 carat up to $7,299 for an 8 carat, all in 18K solid gold, never plated.
Is a lab-grown diamond a real diamond?
Yes. A lab-grown diamond is chemically and physically the same material as a mined diamond, graded on the same scale by the same laboratories. The only difference is how it was formed.
What is a hidden halo?
A ring of small diamonds set underneath the centre stone rather than around it. You see it from the side, not from above, so it adds sparkle without changing the outline of the main stone.
Why is this offered only in 18K gold?
At these carat weights the diamond accounts for most of the value, so a lower gold purity saves very little. 18K gives the richest colour and the best setting for a stone of this size.
Can this ring be resized?
Yes. Select your ring size from the dropdown before checkout. If you're unsure of your size, we recommend visiting a local jeweller for an accurate measurement.
Ring Silhouette: Hidden Halo
Available Metal Colours: Yellow Gold, White Gold, Rose Gold
Metal Karat: 18K