Find The Right Diamond

Unlike traditional jewelry stores or online retailers, OnDiamonds helps you find the most brilliantly cut diamonds with no risk and at a reasonable price. Avoid surprises and never compromise on size or quality. Cut the middleman and deal directly with a wholesaler.

Search For Diamonds
Loose diamonds new york city









Create a Special Ring

Our customers fuel our creativity, and any ring design idea becomes a reality by our skilled master jewelers.

Choice of Metal

Choose between platinum, 14K/18K white, yellow, or rose gold for your ring.

Matched Diamond Quality

If your setting is set with diamonds, we will match their quality to that of the center stone you pick.

Your Vision - Our Skill

Mix and match between popular styles, or come up with something completely new - the choice is yours.

engagement ring cad design
CAD Ready

Once your design is outlined, one of our artists creates a computer-aided design of your ring. You are free to make any adjustments or changes at this stage.

Wax Model

We then create a wax model of your ring prior to casting it. At this stage, only the finger size is adjustable.


Once the ring is cast, the diamonds are set and the metal polished. Future maintenance, such as cleaning and sizing is available at no additional cost as part of our lifetime warranty.

Select an Engagement Ring

Choose from hundreds of ring designs - from classic 6 prong solitaires to delicate micropavé settings - OnDiamonds carries them all.

Lifetime Warranty

We stand behind the products we sell. Each piece of jewelry bought from us comes with a lifetime warranty.

Cleaning & Polishing

Bring your ring or other jewelry for cleaning or polishing, ensuring they'll look as shiny as the day you bought them.

Sizing & Rhodium Plating

We will size your ring free of charge for as long as you own it. We also rhodium plate your rings when needed.

Replacement of Missing Stones

Should any of the small diamonds in your setting become loose or fall out, we will replace them at no additional cost.