Build your engagement ring

The Modern Theory of Love

Choose your diamond, pick a setting, and we’ll build it in our studio — every piece made to order.

Start with a diamond Start with a setting
How it works

Your ring, your way

Start with either the stone or the setting — the result is the same beautiful, made-to-order ring.

Choose a diamond
Step 1

Choose a diamond

Browse diamonds
Choose a setting
Step 2

Choose a setting

Browse settings
We craft your ring
Step 3

We craft your ring

Learn more
Featured

Pieces of the season

A small collection of ready-to-build settings from our studio.

Shop all settings
Vivre Halo

Vivre Halo

From $1,510.00
Aurielle Bold

Aurielle Bold

From $1,280.00
Hand Woven Ring

Hand Woven Ring

From $989.00
Aurielle Hidden Linea

Aurielle Hidden Linea

From $1,520.00
Blossoming Sun Ring

Blossoming Sun Ring

From $1,470.00
Our craft

Made by hand, made to keep.

Each Stone Theory ring is made to order in our studio from solid recycled gold or platinum, with conflict-free lab-grown diamonds certified by IGI or GIA.

Fully online, shipped fully insured, and backed by a guarantee each time.

Read our story
What customers are saying

Rings you'll wear forever.

  • Got my fiancée her engagement ring from Stone Theory and she’s obsessed with it. They really helped me bring the vision together and it ended up being her dream ring. Couldn’t be happier.

    — Jason Morello

  • Ring came in a little small, but Stone Theory fixed it right away. Super easy process and great communication. Fits my wife perfect now.

    — Chris Delucia

  • I wanted a custom ring and had no idea where to start. The team designed something beautiful and exactly what I was hoping for. So happy with how it turned out!

    — Amanda