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About Us

Beauty in the details.

Each piece of jewellery from our collection receives the same level of care and attention.  We strive to produce the finest quality jewellery right here in Toronto, Canada.  We are constantly looking to new ways of manufacturing and design to keep us on the cutting edge of jewellery fashion and craftsmanship.

Curated. GIA Certified Loose Diamonds.

The centre diamond of any jewellery piece is of the utmost importance.  We take the extra step of personally inspecting and individually grading each diamond before using it in our jewellery. GIA is recognized as the industry standard of diamond grading. This is why we use their certificates to begin our search for your ideal diamond. We then review each diamond individually to insure it meets our internal quality standards.

If you have a specific quality range in mind, please contact us and we will be happy to discuss and assist you in your search for the perfect centre diamond.

Socially Responsible. Conflict Free.

Every piece of jewellery manufactured by Jacob Mercari is done so in an ethical and environmentally sustainable manor. We are extremely careful in selecting the right partners. We only work with loose diamond manufacturers compliant with an external auditing process to ensure all diamonds are conflict free. We are big fans of the Responsible Jewellery Council as they do a very good job of ensuring a proper chain of custody is being followed.


Our Philosophy.

We expect ourselves and our partners to uphold the following core values:

  • Be accountable: all products must be of ethical and conflict free sources.
  • Be transparent: all offices, factories and facilities are subject to strict auditing.
  • Be charitable: give back to the community through donations, jobs & training.
  • Be proud: our workmanship is of the highest standards in the industry.
  • Be mindful: only use paper products when necessary and reduce carbon footprint.

We Have Eco Options.

All of our diamond and jewellery products are sourced in a fair and responsible manor. We verify all channels and only work with manufacturers we are comfortable with. That being said, for the customer looking for a ring or jewellery piece that goes the extra mile in terms of the environment, we have options for you.

What our customers are saying...

“I recently purchased an engagement ring through Jacob Mercari and couldn't be happier. Not only are the diamond and band both stunning, but the service and customer experience were truly top notch. I have since recommended Jacob Mercari to friends and I will be returning to soon for wedding bands.”

Paul M.
Whitby, ON

“Greg is the friend in the diamond business that everyone wants. You can trust him for his advice, rely on him for good value and great service. Greg worked with us to find the right stone and right setting for the most beautiful engagement ring I'd ever seen. My husband has dealt with Greg and his father Jonathan for many years and trusts them completely. I just wish they would get together a little more often!”

Cherry J.
Toronto, ON

Loose Mined Diamonds & Lab Created Diamonds.

We offer a large selection of diamonds that have been grown in a laboratory setting.  This offering is completely separate from the loose diamond segment of our business.  We have very strict procedures to ensure that loose diamonds of natural mined origin and lab grown synthetic diamonds are kept separate. All of our natural diamonds have a laser engraving on the edge of the diamond in order to match to the GIA certificate. Lab created diamonds are also sold with a specific & unique type of certificate which mentions its origin.

There are many reasons why we sell man made diamonds. We have a full page devoted to them which you can access by clicking here.

We Give Back.

Our philosophy involves making a positive impact and doing good with a portion of our profits. We donate a percentage of our profits to worthy causes surrounding the diamond and jewellery industry.  We want to help improve the lives of those working and supporting our industry. We hope to expand our efforts in the near future.

Contact us today!