Trying to Find the Perfect Round Cut Engagement Rings?

Unique Round Cut Engagement Rings

You want a engagement ring that’s as gorgeous as she is. Our beautiful, ethically sourced round brilliant cut diamonds are sure to please. With the guidance of our artisans, you can’t go wrong.

The round brilliant diamond cut engagement rings we offer:

  • Are painstakingly handcrafted by a local team of craftsmen using ethically sourced materials
  • Benefit from the knowledge of our staff who will guide you to the perfect ring
  • Come with a independent third party valuation so you know you’re getting the best deal

We have a large collection of round brilliant cut diamond engagement rings in a range of styles. With the expert guidance of our staff, you’ll be able to find the ring that perfectly complements her. You want a ring you can both take pride in. The wide range of round cut diamond engagement rings we have ensures there’s something perfect for her.

Round Brilliant Cut VS Old European Round Cut

When discussing round brilliant cut diamonds, it is important to understand the difference between older styles and the more modern brilliant round cut. Both of these can be called round cut diamonds but there are some significant differences. The original old European round brilliant diamond was made in a time where there was lower access to high quality diamonds. With newer technologies making the perfect cut easier to achieve, along with a more plentiful supply, we now have the ability to cut diamonds to maximize their beauty.

Because of this, instead of being cut to maximize brilliance, they were specifically cut to enhance colour and clarity.

Characteristics of the Round Cut Diamond Engagement Ring

Unlike princess cut diamond rings, the round brilliant cut consists of 57 or 58 facets (including the culet) and offers exceptional light reflection, also known as brilliance. These diamonds are exceptionally popular, making up the bulk of the diamond industry. However, because of the fact that cutting a brilliant round cut diamond results in the highest amount of lost rough diamond weight, they are also quite expensive.

Why Choose a Round Cut Diamond Engagement Ring

There are a lot of great reasons you should consider a round brilliant cut diamond. Their radiant beauty is unmatched by any cut. Whether used in solitaire, or accented by other supporting diamonds, the sheer brilliance of the round cut is what makes it so popular.

While it does have a higher price, this can be partially circumvented through careful shopping and a bit of knowledge. When choosing a diamond, you can be safe going for an eye clean quality. This means that while there are flaws, they cannot be seen by the naked eye. As a result, they will not be noticed, giving you some savings.

Another way to do so is to plan your setting first. By having this planned ahead of time, you’ll know what areas of the diamond will be covered by the ring. As a result, you can get a stone with flaws in those areas, as they will be blocked from view. This can lead to a lot of savings.

The History of the Round Brilliant Cut Diamond

Traditional round cut diamond rings have been around for many years. However, the old european style evolved in the early 20th century. In 1919, Marcel Tolkowsky sparked a wave of interest in the Round Cut Diamond by publishing his work, “Diamond Design: A Study of the Reflection and Refraction of Light in Diamond” which went into detail of the ideal cut for a round brilliant diamond. Since Tolkowsky’s influential piece was written, the round cut diamond has remained the most common cut.

Before the 20th century, during the Edwardian, Art Deco and Victorian eras, the Old European cut style was popular. As knowledge and technology improved, diamond cutting techniques became more advanced. Cut design shifted toward larger tables, smaller culets, and longer, leaner facets. While old European style diamonds were cut primarily for color, the round brilliant is now cut for its fiery glow and light performance.

Why You Should Choose Our Round Brilliant Cut Engagement Rings

You want the best. That’s why our passionate team of skilled artisans are always available to guide you through the process. We can show you a range of different diamonds and rings to help you along the selection process. With their guidance, you can’t go wrong. We also provide third party valuation so you know the true value of your selection.

All of our rings are completely ethically sourced, both in terms of our diamonds and in terms of the alloys we use. You get great value along with peace of mind knowing that you made the best decision possible. You’ll both be proud of the ring you choose. Contact us today to get started.

Speak to a Ring Designer







I found Jacob Mercari on internet. At first I was skeptical with Greg. After several discussions. he made me feel comfortable and took his time in explaining the 4c's and provided me options for my diamond earrings purchase - no pressure. It was a surprise birthday gift for my wife. He's very professional and answered all my inquiries in a timely manner. We were very happy and satisfied with Greg. I would recommend him.
Wilson Ngo
Wilson Ngo
14:53 17 Feb 17
Working with Greg at Jacob Mercari was a great experience. His knowledge and guidance through the process of design and implementation was invaluable. Thanks so much!!
krishna beharry
krishna beharry
21:17 16 Feb 17
Dealing with Gregory Jacobson at Jacob Mercari, was an absolute joy. After painstakingly searching for a professional outfit which you could trust, I couldn't be more pleased to have purchased a ring from the company. My fiancee and I were beyond happy with the outcome of the ring quality, price and delivery time. We will definitely be going back to deal with Gregory Jacobson at Jacob Mercari, and will strongly suggest anyone looking for jewelry to only deal with Gregory Jacobson at Jacob Mercari! Thanks again!
Devin Wosminity
Devin Wosminity
18:56 08 Nov 16
My overall experience with Jacob Mercari was educational, value-added, and fun! And my impressions of Greg as an individual are that he is patient, meticulous about providing quality, and above all trustworthy.Greg far exceeded my expectations with regards to 3 custom rings (1 engagement, 2 wedding bands); however, what truly stands out is not the final product (which is amazing) but rather the process Greg takes you on.He goes above and beyond to invest into you as a customer. What I mean by this is that Greg takes the time to educate you on the industry as a whole, his company, the process, and is more than willing to answer any questions you may have at any time. He does all of this without any commitments from you monetarily or otherwise, and even if you do not make a purchase, after meeting Greg you will be more informed and prepared to make smart purchasing decisions. My absolute favorite part of the entire process is working with Greg to design the rings. He is a great listener and is able to translate your thoughts effectively into a great design. It’s also really helpful when you can touch and feel loose stones and example settings, as you really begin to understand what it takes to put a ring together. As a next step, you work with Greg to review 3D renderings of your design and have an opportunity to make sure all the fine details that truly make your ring unique are taken care of (the graphics are pretty cool too).It’s at this point in the process you leave things in Greg’s very capable hands. He provides frequent updates on the progress of your rings, and he is sure to follow-up if there are questions about the details – I really appreciate that he doesn’t make any assumptions on your behalf and that he ensures you are comfortable throughout the entire process.In the end, what you are left with is something truly unique and something you really feel you’ve had a part in putting together (as opposed to just picking out something off of a retail store shelf).I have and will continue to endorse Greg to my friends and family!
Derrick Sarwan
Derrick Sarwan
02:27 10 Jun 16
Greg did a fantastic job for us! I trusted him every step of the way, and he was very patient in answering all of my questions and working with me. He was a pleasure to work with--from finding the right stone to designing the whole piece. I would not hesitate to recommend Greg!
Jordan Waltman
Jordan Waltman
18:18 20 Sep 16
Such amazing work! Im so happy i find found you guus to help custom make my now fiances ring! She absolutely loves it! I couldnt have asked for better! You guys are the best! Thank you guys!
Bronson Houle
Bronson Houle
02:30 23 Jul 17
I had a great experience with Jacob Mercari. Gregory was very knowledgable and helpful.
Samantha Claydon
Samantha Claydon
08:19 28 Aug 17
I recently purchased a custom engagement ring. Having done my research I knew Jacob Mercari had great ratings, and my experience backs up why they have 5-star ratings time and time again! I vaguely knew what I was looking for prior to my first visit, but Greg worked with me to design the perfect engagement ring! My fiance is over the moon about how amazing her ring is! Initially I feared my tight timeline would be an issue, but Greg made sure the ring was ready very quickly. And the quality... wow! I guarantee you will not be disappointed buying a ring here!
Chris Rausch
Chris Rausch
23:07 03 Oct 17
I think I visited 7 different jewellers across Toronto (and online!), but found Jacob Mercari to offer the best selection, value, and service. Instead of pushiness and deception, I found graciousness, excellent knowledge of the market, and integrity. My fiancée loved the ring -- the diamond as well as the artistic setting. Couldn't recommend them higher.
Logan Gates
Logan Gates
18:59 10 Oct 17

Google Rating
5.0

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.

And if you change your mind, or if your custom design is not what you expected, we’ll either remake your ring at no cost to you or you can simply return your diamond within six months for a full credit.

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.

Educated Advice
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 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, for any reason, we’ll remake it at no cost to you. It’s on us to make sure we exceed your expectations.

Complete Aftercare
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.

Free Delivery
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.

Free Support
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.

Ethical Partnerships
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.

Responsible Sources
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.

Recycled Materials
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.

CanadaMark Diamonds
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.

Speak to a Custom Ring Expert Call now