Certified Natural Diamonds

Shop GIA and IGI certified natural diamonds for engagement rings, custom jewellery, and loose diamond purchases. Get expert guidance from our Toronto studio, with free insured shipping across Canada and the USA.

Shop Loose Diamonds by Shape

Discover our curated collection of certified loose diamonds in every classic cut

Shop Natural Diamond Jewellery

Natural diamonds are rare, timeless, and formed deep within the earth over billions of years. At Jacob Mercari, each natural mined diamond is carefully selected for quality, brilliance, and lasting beauty, with certification from trusted grading labs such as IGI or GIA.

Why Choose Jacob Mercari

Certified Natural Diamonds

Every diamond is certified and transparently sourced, ensuring authenticity and quality you can trust.

Private Diamond Guidance in Toronto

Local expert guidance available in Toronto to help you find the perfect piece for your special moment.

Custom Design

Bespoke and custom jewellery design services to bring your unique vision to life with expert craftsmanship.

Insured Shipping

Fully insured shipping on all orders over $400, ensuring your precious jewellery arrives safely and securely.

Custom Jacob Mercari 14K Yellow Gold Cushion Cut Diamond with diamond halo and pave band

Find the Natural Diamond Made for Your Moment

Explore certified natural diamonds, compare options with expert guidance, or book a private consultation at the Jacob Mercari Toronto studio.

Natural Diamond Education

What Makes A Natural Diamond So Special

The 4Cs Diamond Guide

Buy Loose Diamonds Online Canada

How to Choose the Perfect Engagement Ring

Common Questions

Are natural diamonds certified?

Yes. Jacob Mercari offers certified natural diamonds with grading reports from respected labs such as IGI or GIA.

Can I choose a loose natural diamond?

Yes. You can shop loose natural diamonds and pair your selected stone with an engagement ring setting or custom jewellery design.

Do you offer custom natural diamond engagement rings?

Yes. Jacob Mercari offers custom engagement ring design using certified natural diamonds in your preferred shape, carat weight, metal, and setting style.

Do you ship natural diamonds across Canada and the USA?

Yes. Jacob Mercari offers insured shipping across Canada and the USA.