Natural, Earth-Mined Diamonds

Sharp manufacturer direct pricing. Visit us in Toronto.

Natural Diamonds

The Keys to our Success:

Lowest possible pricing
True wholesale prices on accurately graded diamonds.

No two diamonds are the same
We guide you and give invaluable advice.

More to loose diamond selection then the “Four C’s”
We look at many other factors such as milkiness, crystal characteristics, hues, etc.

Know your sources
Conflict-free guaranteed or Canadian loose diamond origin guaranteed.

Someone to talk to
Our customers love having a person to discuss and debate possible options with!

Inventory on site
We will show you curated loose diamonds or lab-grown diamonds that we have hand-selected to be the best of all categories.

Custom Diamond Engagement Rings

Design your Custom Engagement Ring in Toronto

We don’t just sell loose diamonds! We are more than happy to show you various ring designs to complement your diamond. Whether you want to make something unique or combine a few different designs, we can help. We guide you through the process of jewellery manufacturing in an easy and friendly way.

Start Searching for the Perfect Natural Mined Diamond Now

The diamond-buying experience can be very intimidating and confusing at first. When you make an appointment with us, we go through a complete education and show you Canadian diamonds for sale at wholesale prices. We do this to make you more comfortable with the product and help you get a feel for the characteristics most important to you.

CanadaMark Canadian Diamonds

GIA Certified Diamonds

All of the natural diamonds in our stock are GIA-certified. The Gemological Institute of America is widely regarded as the industry standard. We use the GIA certificate as a starting point. After establishing the correct grading for each diamond, we delve deeper and evaluate the hues, fluorescence, milkiness, tinges and the actual crystal itself. We discuss these elements in more detail during our meeting.

Independently Verified Canadian Diamonds

Jacob Mercari is proud to be an official distributor of the CanadaMark diamond program. The CanadaMark hallmark program allows us to provide our customers with an independently verified certificate of origin.

Responsibly mined in Canada’s Northwest Territories. Natural, untreated & conflict-free. Tracked through audited processes at every stage of manufacturing process. Manufactured to meet specific quality standards.

Gemological Institute of America logo

100% Free of Conflict

Any diamond purchase from us will be 100% free of conflict. Our partners have strict auditing procedures in place to guarantee and track the diamonds as they move through the manufacturing chain of custody. We only work with companies that purchase directly from diamond miners and manufacture themselves. We also expect our partners to give back to local communities through jobs training, donations and investment in local business initiatives.

Ask us a Question or Book a Meeting

By Appointment Only.


27 Queen St E #1004
Toronto, ON M5C 2M6

Call or Text Message:

(416) 861-8204

Hours of Operation:

Monday – Thursday – 9:00am – 5:30pm EST
Friday – 9:00am – 4:00pm EST
Saturday – By Appointment Only 

Evening and Saturday Consultations are Available by Appointment

Say Hello!

We are here to help. Ask a question or request an appointment below.

oval rose gold diamond ring

Available By Appointment Only.

Monday – Thursday 9:00am – 5:30pm EST
Friday – 9:00am – 4:00pm EST

Click here for up-to-date hours

Evening and Saturday Consultations are Available

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