OROSERGIO Studio is where artistry meets precision, led by Master Goldsmith Sergio Chamahyan — a jewellery artisan with 30 years of expertise, crafting bespoke pieces in downtown Toronto.
“In my 30-year design journey, I've had the privilege of creating countless pieces and refining my craft. Today, I'm proud to work alongside my expert team — master artisans who share my passion and standards. Together, we bring each design to life with precision and care. Every piece that leaves my atelier passes through my fingers at every stage of its creation. That's not a marketing line — it's a promise I made when I opened this studio more than two decades ago, and one I continue to keep today.”— Sergio Chamahyan, Master Goldsmith & Founder
At OROSERGIO, we don't just make jewellery — we create heirlooms. Every piece is crafted with meticulous attention using platinum, gold, and ethically sourced diamonds certified through the Kimberley Process.
Our approach is deeply personal. There are no assembly lines and no shortcuts. Every stone is hand-selected, every setting is hand-finished, and every design is shaped around the person who will wear it. This is jewellery made to carry meaning — across years, across generations, across lifetimes.
We collaborate closely with you to bring your vision to life through artistic craftsmanship, creating pieces designed to last for generations — uniquely yours, never repeated.
The French tradition of pièce unique — one-of-a-kind creations — is at the heart of everything we do. Whether it's a custom engagement ring, an anniversary necklace, or a family heirloom redesigned for a new generation, each commission begins and ends with a single question: what does this piece mean to you? Your answer shapes every decision, from the choice of metal and gemstone to the final polish.
OROSERGIO is a proud member of the Canadian Jewellers Association (CJA) — the national trade body representing professional jewellers across Canada. CJA membership is not simply a badge; it is a commitment to the highest standards in the industry.
All diamonds are sourced in full compliance with the Kimberley Process, ensuring they are conflict-free and responsibly mined.
CJA members adhere to a strict code of professional conduct that governs transparency in pricing, accurate representation of materials, and honest communication with clients.
Should any issue arise, CJA membership provides a formal dispute resolution process — giving you an additional layer of consumer protection.
CJA members are expected to pursue ongoing professional development, keeping their skills and knowledge current with the latest techniques and industry standards.
When you see the CJA designation, you know your jeweller meets the highest industry standards in Canada. It is our way of showing that the trust you place in OROSERGIO is earned — and continually upheld.
We recently redesigned our downtown Toronto studio to create a warm, welcoming showroom experience for our clients. When you visit OROSERGIO, you are not walking into a typical jewellery store — you are stepping into a private atelier where Sergio and his team of dedicated artisans work, design, and craft every piece by hand.
The showroom is designed to feel like an extension of our craft — comfortable seating, natural lighting for viewing diamonds and gemstones in their truest colour, and a relaxed atmosphere where you can take your time making decisions without pressure. Whether you are here for a first consultation or picking up your finished piece, we want every visit to feel special.
Our studio is located at 27 Queen St E, Suite 803, on the 8th floor — easily accessible from King and Queen streetcar stops, steps from the Financial District. Appointments are recommended but not always required. Call us at 647-428-7013 or book online.
From the first spark of an idea to the final polish, you're invited to be as involved as you would like. Our process includes one-on-one consultation, sketches, CAD models, stone selection, and refinement — all under one roof in downtown Toronto.
The OROSERGIO studio is not a retail showroom. It is a true working atelier — where every piece of jewellery is designed, crafted, and finished entirely by hand. When you visit, Sergio welcomes you personally into the boutique-style showroom, takes the time to understand your vision, and guides you through each step with your priorities at the centre. More than that, he returns to the bench himself — the very same bench where every piece in our collection has come to life — bringing your design into reality with his own hands. Supported by a team of skilled artisans who share his standards, every creation is touched and refined by Sergio at each stage of its journey. When the person designing your piece is also the one crafting it, nothing is lost in translation. Every decision is intentional, every detail understood — resulting in a finished piece that remains remarkably true to the original sketch or CAD design, just as it was envisioned.
Book an AppointmentVisit Sergio's studio at 27 Queen St E in downtown Toronto to see the workshop, meet the team, and discuss your project in person. Virtual consultations are also available for clients across Canada.
Book an Appointment