About Jacob Mercari

Founded in Toronto by Gregory Jacobson, Jacob Mercari offers thoughtful guidance on natural and lab-grown diamonds, gemstones, engagement rings, and custom design and fine jewellery. Shop online or meet with us by private appointment to explore your options.

Meet Gregory Jacobson

Gregory Jacobson is the President & CEO of Jacob Mercari and brings over 18 years of experience in the diamond and jewellery industry.

Known for his approachable style and deep industry knowledge, Greg is passionate about helping customers feel confident, informed, and excited about their jewellery purchases. Whether you are choosing an engagement ring, a diamond, a gemstone, or a custom piece, his goal is to make the experience clear, relaxed, and enjoyable from start to finish.

Early in his career, Greg spent time overseas learning the industry from the ground up, including diamond and jewellery manufacturing, global sales, sourcing, and distribution. This hands-on experience gives him a unique understanding of quality, craftsmanship, and value.

At Jacob Mercari, Greg creates a welcoming, no-pressure environment where customers can ask questions, explore their options, and make decisions with confidence. His focus is simple: honest guidance, exceptional service, and jewellery you will be proud to wear for years to come.

Jacob Mercari Loose Diamond Presentation

Honest, Reliable Service & Advice

  • Personal guidance on diamonds, gemstones, and custom design
  • Time to compare options and ask questions
  • Online shopping and private appointments at our Toronto studio
  • Insured shipping across Canada and the USA

Diamond consultation tools at Jacob Mercari Toronto studio

Our Core Values

  • Be Accountable
    We take responsibility for the guidance we provide and the jewellery we offer.
  • Be Transparent
    We explain your options clearly, from diamond and gemstone choices to design details and pricing.
  • Be Personal
    We take the time to understand what matters to you and help you make a confident choice.
  • Be Proud
    We pay close attention to the design, materials, and finishing of every piece.
  • Be Thoughtful
    We consider your style, budget, and how you plan to wear your jewellery as we guide you through the process.

Our History

Diamond District in Belgium Circa 2007

2007 - Learning the business

After graduating from university, founder Gregory Jacobson began his career in the diamond industry. He travelled to Antwerp, Belgium, to study and work with a large De Beers Sightholder, sharpening his knowledge of diamonds, manufacturing, and global distribution.

Toronto skyline representing Jacob Mercari’s return to Canada in 2008

2008 - Canada Calling

Greg returned to Canada to join his family’s diamond business, working in wholesale and selling to jewellery stores across North America.

Jacob Mercari Custom Diamond Hidden Halo Engagement Ring in 14K White Gold

2017 - Jacob Mercari is Born

Greg launched Jacob Mercari to cater to Canada's retail diamond and jewellery market. Today, we aim to create meticulously crafted jewellery pieces and share our passion with our customers.

Diamond engagement ring with Toronto skyline – Jacob Mercari Toronto jeweller

Looking for a trusted Toronto diamond jeweller?

Book a private consultation to explore natural and lab-grown diamonds, gemstones, custom engagement rings, and fine jewellery. Visit our Toronto studio or shop online from across Canada and the USA.

Toronto Jeweller | Serving Canada & USA