Engagement Rings & Custom Diamond Rings.
Custom Crafted in Toronto.
The Best Custom Jeweller in Toronto
There’s no better way to celebrate your unique love than with an engagement or wedding ring, pre-designed or custom-made from Jacob Mercari. Our experts will create a precision-crafted custom ring made exclusively for her, using only GIA-certified ethically-sourced diamonds.
Enjoy a friendly, relaxed, and pressure-free environment in our Toronto jewellery store knowing that you can’t make a mistake.
We guarantee the best possible pricing. If you find a better price online, we will match the price for any ring, gemstone or diamond of the exact same quality and weight.
You’ll be amazed at how easy surprising her with the timeless custom or pre-designed engagement ring of her dreams can be. That’s the Jacob Mercari Promise.
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Our Promise to You
We Work To Earn Your Trust
Trust is something that is earned. Our goal is to earn your trust by offering the highest quality jewellery, being fully transparent in our practices, and working with the belief that it is our responsibility to satisfy your interests and desires in a respectful and friendly environment.
We Stand Behind Our Products
We only sell top-quality GIA certified loose diamonds and we carefully curate our extensive inventory. This allows us to provide a larger selection of truly special diamonds.
No Pressure Sales
There are no salespeople at Jacob Mercari – only passionate jewellery design experts. As our guest, you’ll enjoy a friendly and honest customer experience with no hard ball or pressure selling.
New to the diamond buying experience? First time with custom-crafted jewellery? You’ll never make a mistake with us. Questions are always welcome and we will answer or find the answer for you. We’ll teach you everything you need to know about how to choose the perfect diamond, so you’ll feel as confident with your choice as you are with her.
Proof of Authenticity
When you purchase a Canadian-origin diamond from our collection we’ll provide you with a certificate of authenticity outlining the history, grading, and details of your diamond that you can use for insurance purposes. You’ll receive our assurance in writing that your diamond comes only from legitimate, tracked sources.
Craftsmanship is at Our Core
We work with the finest artisans and use only the highest quality alloys and materials. We go the extra mile to make sure the engagement rings and jewellery we produce are made with an extreme eye to detail and precision. If a piece does not meet our exceptionally high quality standards, we will start over and do it right at our cost.
The Finest Quality Diamonds and Gemstones
We employ only the highest-skilled jewellers and goldsmiths who work with the finest quality diamonds and gemstones.That means no brown tinges, no strong fluorescence, no surface inclusions, no cracks, and no centre black inclusions.
From top quality metal alloys to the most exquisitely cut and ethically sourced diamonds, you’ll be absolutely assured of the finest quality stone.
Completely Unique Creations
Your custom ring will be unlike any other on Earth, and she’s guaranteed to receive a ring that will be as unique and precious as your love.
Thorough Quality Inspection Process
Our attention to detail is second to none, and every piece is rigorously and thoroughly hand inspected before delivery. You’ll enjoy the peace of mind that comes with knowing each diamond has been strictly graded and expertly cut. We go well beyond the 4 C’s – carat, colour, clarity, and cut – delving into the crystal’s inner qualities and very carefully critiquing it based on its purity and various colourations – to ensure that we’ll never deliver a product that is anything less than perfect.
You Can Change Your Mind
We stand behind everything we sell. But most importantly, we stand behind you. If you select a natural diamond from our inventory and change your mind within six months, we will credit the full amount of the diamond cost to you. It’s our way of letting you know we’re in this together, and we will never allow our customers to experience buyer’s remorse.
Your Custom Ring Will Exceed Your Expectations
We promise you an experience free of surprises. Our artisans will craft the ultimate ring creation after detailed consultations with you. But if your custom-designed ring isn’t exactly what you had imagined at the time of final inspection & pick-up, we’ll remake it at no cost to you. It’s on us to make sure we exceed your expectations.
Unlike most jewellers, our partnership with you doesn’t end once we’ve delivered the perfect jewellery – it’s just the beginning. We provide a full range of services post-delivery to ensure you maximize your investment and fulfill her dreams.
Our free aftercare services include a ring sizing, as well as inspection and diamond or gemstone tightening to ensure a magical fit. We’ll clean your ring for the life of the ring, and we will be delighted to polish it for you before the wedding.
A Stress-Free Environment
Our mission is to consult with, advise, and educate you in a relaxed, private, and friendly environment. There are no commissioned salespeople with Jacob Mercari, just passionate jewellery design experts who are committed to helping you fulfill her dreams. You’ll never feel pressured in any way.
Your Jewellery is Ethically Produced
We take our ethical obligations seriously. All of our creations are made locally in Toronto, Canada, using only materials ethically produced and sourced from conflict-free conditions and using environmentally sustainable processes. We are an authorized distributor of CanadaMark diamonds, representing the pinnacle of responsible diamond trading.
We believe in offering our employees fair wages and employment conditions, as well as giving back to the community by donating a portion of our sales to charity.
All of our products can be delivered to you free of charge, anywhere in North America.
Price Match Guarantee
We are committed to your satisfaction, and we will price match any comparable competing offer. Moreover, unlike other jewellers, there’s no need to haggle with us; all of our products feature our most attractive price upfront, with full transparency, so you’ll know you’re receiving the best quote possible.
We Keep Our Costs Low
Our jewellery is made by us. A complete control over manufacturing lets us keep our costs down and our quality exceptionally high.
We also work directly with licensed diamond manufacturers to provide the most brilliant diamonds at the sharpest possible prices. With 30 years of experience in the business, we know what to look for and how to source the best products at a fair and reasonable cost.
We provide free aftercare support for all our valued customers. From free ring sizings, tightening, and maintenance to free cleaners – we’re at your service to ensure your jewellery remains in pristine condition.
All of our industry partners are carefully screened and conform to the highest ethical standards, and we will only work with members of the Responsible Jewellery Council. Our partners are regularly audited for supply chain custody, ethics, and safe working conditions.
At such a special time in your life, you want to ensure that your diamonds are sourced from only responsible and ethical suppliers. We require our manufacturing partners be licensed to receive rough diamonds directly from responsible mining companies such as De Beers and Dominion Diamond Corporation to give you peace of mind from knowing that your diamond has been obtained fairly and responsibly.
We vet and confirm the quality of the sources of all of our diamonds and gemstones, and only obtain loose diamonds directly from the manufacturers – never through intermediaries.
CanadaMark Authorized Distributor
We offer loose diamonds from CanadaMark, a hallmark of the Canadian-owned Dominion Diamond Corporation committed to responsible mining and sustainable practices.
GIA Certified Diamonds
All of our diamonds are independently tested and certified by the Gemological Institute of America (GIA) to ensure their quality. Any diamond we sell will include a GIA report and grading certificate.
We are proud to use recycled gold sourced from previously mined jewellery and discarded electronics as part of a sustainable and responsible jewellery practice.
Our Goal is Sustainability
We like to rest easy at night knowing we have made a beautiful piece of jewellery manufactured from environmentally sustainable materials.
We insist on only working with industry partners who are hard-working, trustworthy, and dependable, and who subscribe to the same values of promoting environmental sustainability and responsible practices. To that end, we are proud to work with recycled gold and platinum, as well as offer environmentally-responsible CanadaMark loose diamonds. We exclusively choose partners who are members of the Responsible Jewellery Council.
Recycled Gold and Platinum
We use recycled gold and platinum in our jewellery, preventing them from having a harmful impact on the environment.
We are proud to be an authorized distributor of CanadaMark diamonds, who are the standard bearers for providing responsibly and environmentally sustainably sourced diamonds from their mines in Canada’s Northwest Territories.
Conflict-Free and Responsibly Sourced Gemstones
Our promise to you is that your diamond or gemstone is obtained from verifiably responsible partners and is sourced from conflict-free mines, through fair trade and employment practices.
We Practice What We Preach
We make all of our products ourselves at our Toronto, Canada, facilities. Since we control the manufacture of your jewellery, you can rest assured that it was created responsibly and in a positive environment. We believe in providing our associates with with fair wages and positive working conditions.
We also believe in giving back to the community, and as such we donate a portion of our sales to various charitable organizations.
Schedule appointment or send us a message
By Appointment Only – Please Call or Email to Schedule
1004-27 Queen St E, Toronto, ON M5C 2M6
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Hours of Operation:
9:00am - 4:00pm EST