Build Your Own Diamond Ring

Celebrate your unique love story.

Start with a Setting Start with a Diamond

Your Own Unique Vision

If you want the freedom to create a custom engagement ring online that matches your personal style, EX3 Diamond offers you the option to build your own engagement ring from the ground up. Whatever your personal style, the ability to effortlessly build an engagement ring online offers the freedom, individuality, and inimitable style to help you create the perfect piece.

1 - Choose a Diamond

Build your own engagement ring online when you start with the right stone. Narrow your search by stone shape, cut, clarity, color, and carat to see what we have in stock right now. With our massive selection, you can find a stone that fits every style and budget.

2 - Choose a Setting

Browse our selection of settings, including beautiful classic designs, unique vintage silhouettes, and stunning modern styles. You can also choose your preferred semi-precious metal from a selection including rose gold, yellow gold, white gold, and platinum.

3 - Complete Your Ring

You’ve used our online engagement ring builder to personalize your design. Now it’s time to complete your ring purchase with a few extra add-ons, like our extended five-year warranty and an expert appraisal only available from our sister store, Pompeii3.

halo diamond engagement ring
Ring Education

Everything you need to know about our lab-created diamonds, jewelry, and more.

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stack of rings on a woman’s ringer
Custom Ring Design

Start designing now to create a ring that embodies your love and commitment.

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Customer Care

We are on staff 24/7 and can always help you make the right choice.

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While we offer only lab-grown diamonds for our custom engagement ring online, each stone is just as unique as those found in nature. No diamond is exactly alike – just like the story of your love.

Quality Diamonds

We offer premium diamonds that last for years.

Sustainable Stone

We are proud to carry environmentally and socially conscious diamond options.

Beauty & Rarity

All of our diamonds are compositionally identical to mined diamonds.

Unique Value

Our diamonds are less expensive than their natural diamond counterpart.


Certified Diamond Sourcing

At EX3 Diamond, we go above and beyond to ensure you’re confident that the stones for building your own engagement ring are responsibly and ethically sourced. With an SCS certification from GBBM, you can rest assured that we use only recycled metals and lab-grown gemstones that actively avoid irresponsible or illegal sourcing methods. Our certification illustrates how we meet and exceed the benchmarks for social and environmental accountability.

Learn More About GBBM