Loose Diamond Search

Explore our curated selection of natural and lab-grown diamonds, available in a wide range of cuts, carat weights, and styles. Whether you’re looking for a classic round brilliant diamond or a distinctive fancy shape, Jacob Mercari makes it simple to find the perfect stone for your engagement ring.

Can’t find exactly what you’re looking for? Contact Jacob Mercari in Toronto, and our team will be happy to source the perfect diamond and guide you through every step of the process.

Create a Custom engagement ring

Design a ring that’s uniquely yours. Our team guides you through every step of the process with full transparency and expert craftsmanship.

Top Engagement Ring Styles: Timeless Trends

An engagement ring is more than a piece of jewellery it’s a reflection of your story, your style, and the life you’re building together.

How to Design a Custom Engagement Ring

An engagement ring is one of the most significant pieces of jewellery you will ever purchase. It marks a moment that matters and for many couples, a ring pulled from a display case simply does not feel like enough.

Buy Loose Diamonds Online

At Jacob Mercari, we've built a diamond search experience that puts thousands of certified loose diamonds directly in your hands before you ever speak with anyone, before any pressure, before any commitment.

From our people
From our people
This is THE place to get the ring. Greg is an absolute fantastic person to work with and his designs are flawless. He is patient, flexible, can work with any budget, and is incredibly welcoming. He makes the process stress free and super clear. My now fiance loves her custom ring and we’ll most likely come back for the wedding bands! Highly recommend!
— Diego O., Toronto
From our people
Had a fantastic experience with Greg at Jacob Mercari! He was incredibly helpful throughout the process, from designing the ring to selecting the perfect stone. His expertise and suggestions made all the difference. Highly recommend!
— Aaron., Toronto
Jacob Mercari Custom 14K Yellow and White Gold Emerald Cut Lab-Grown Diamond Engagement Ring
From our people
I purchased an engagement ring online from their website. It was very easy. They contacted me right away and the communication was excellent. The ring shipped in a timely manner as they said 3 weeks and it came in 3 weeks. The ring came and it was AMAZING!! my fiancé was ecstatic. I highly recommend Jacob Mercari. Wish I could give more than 5 stars.
— John.G., Toronto
Jacob Mercari 14K White Gold 5 stone round cut lab-grown diamond engagement ring