Collections
6 products
Shop The 18 KARATS Collections
Custom Designs
Have an idea? Let’s make it real.
You bring the vision—we bring it to life. From the setting to the stone to the smallest, almost invisible details, everything is shaped around you. No templates, no shortcuts—just a piece that feels like it was always meant to be yours.
Create a Ring That Feels Like Yours
Your ring should feel personal from the very first detail. With our diamond ring builder, you can create a custom engagement ring around the diamond, setting, and style that feels right for you.
Choose your preferred diamond shape, lab-grown or natural diamond, carat size, color, clarity, and setting to build a ring that reflects you.
Lifetime Warranty on Every Piece
Every 18 KARATS piece comes with expert craftsmanship and a lifetime warranty.
30 Day Money Back Guarantee
If you're not completely satisfied, return your piece within 30 days for a full refund.
90 Days Unlimited Resizing
Need a different size? Enjoy complimentary resizing for 90 days to ensure the perfect fit.
Free Shipping and Returns
We offer free shipping and return service for a worry-free experience.
Precision and Quality
We utilize microscopes to set all the diamonds for maximum accuracy and quality.
Customized For You
Modify any existing design or create a one-of-a-kind piece with us made just for you.
