We're here to turn your engagement ring into a timeless heirloom — crafted to be cherished for generations to come.
Book an AppointmentWe source the right diamond of any cut, colour, and carat, to fit the right setting with the right finish. Our diamonds are ethically sourced and certified through the Kimberley Process, whether you prefer natural or lab-grown — and we never settle.
“Huge congratulations on the “She said Yes!” It was a joy guiding you step-by-step to create the perfect ring.when you’re ready I’d love to help with the wedding bands or any future pieces .Drop by anytime for a quick clean & check . Wishing you both a lifetime of love and sparkle ! Sergio Orosergio Fine Jewellery”
“Sergio is the best jewelry in the city. I know this because I’ve been to a lot to find the perfect place to design custom rings and bracelets. I’m yet to purchase the ring but this is off the first appointment and obviously I’m going back to get the ball rolling. I got the perfect engagement for my partner at what I thought was the best and perfect jeweller but Sergio outshines him by a lot. Sergio is transparent, honest, welcoming, professionally and friendly. He knows his stuff. Can’t wait to post the rings once we purchase it.”
“Sergio made my engagement ring. He worked from an idea that I had seen and it turned out exactly as I’d hoped for. Great craftsmanship and beautiful ring. He also provides great service in maintaining the ring quality, checking the setting integrity and cleanings.”
“Sergio is absolutely amazing! He took care of everything step by step to ensure I got the exact most perfect ring I could dream of. I cannot recommend him enough! Also…she said yes!”
“Sergio is a very experienced and talented jeweller. He communicated well with our needs and responded quickly. I appreciate his design, jewel choice, and craftsmanship. His rings are of great value, and I recommend buying engagement and wedding rings from him!”
“Thank you Brad! I truly appreciate your kind words & support.It was a pleasure working on your Wife’s engagement & wedding rings and I am thrilled to hear that you are happy with the quality & value . Wishing you both a lifetime of happiness,hope to see you again soon! Sergio”
“Hi Andrew, Thank you so much for your kind words! It was a pleasure working with you to create your custom engagement ring. I’m thrilled to hear you’re happy with the final result. Wishing you both all the best! Warm regards, Sergio”
“I had an amazing experience designing my custom engagement ring with Orosergio! The team was incredibly helpful and attentive, and the final result is absolutely stunning. I was also pleasantly surprised to find that they offer an upgrade option, allowing me to exchange the stones in the future if I ever want to. It’s such a great peace of mind to know I have that flexibility. Highly recommend this place if you’re looking for something unique and special!”
“Love the engagement ring I got for my fiancé, when I showed it to her she said it was exactly as she wanted it, the price was amazing and Sergio was very helpful throughout the whole process. He is great and will be getting my wedding bands with him too!!”
“Sergio went above and beyond for my husband and I. He did an amazing job with my dream engagement ring.Got my wedding band done by him as well. He also replaced and cleaned my everyday rings. The customer service was amazing and highly recommend you check them out. He has a great collection of pieces.”
“We had the best experience being served by Sergeo My cousins engagement ring was designed by him,. An amazing beautiful design, the best finishing, what a great setting, we all know that when it comes to diamond rings the setting should be done perfectly and this is what we got Can’t thank him enough for this outstanding piece”
“What a gem! I went to Orosergio Custom Jewelry for my custom engagement ring. Sergio was very knowledgeable and accommodating. This was my first time buying jewelry and his professionalism made this process such a pleasurable experience. The ring came out beautifully and everything I'd imagined it to be! I'm looking forward to working with Sergio in the future to get our wedding bands made. I would highly recommend anyone to go to Orosergio for your jewelry needs. Thank you so much Sergio!”
“Huge congratulations on the “She said Yes!” It was a joy guiding you step-by-step to create the perfect ring.when you’re ready I’d love to help with the wedding bands or any future pieces .Drop by anytime for a quick clean & check . Wishing you both a lifetime of love and sparkle ! Sergio Orosergio Fine Jewellery”
“Sergio is the best jewelry in the city. I know this because I’ve been to a lot to find the perfect place to design custom rings and bracelets. I’m yet to purchase the ring but this is off the first appointment and obviously I’m going back to get the ball rolling. I got the perfect engagement for my partner at what I thought was the best and perfect jeweller but Sergio outshines him by a lot. Sergio is transparent, honest, welcoming, professionally and friendly. He knows his stuff. Can’t wait to post the rings once we purchase it.”
“Sergio made my engagement ring. He worked from an idea that I had seen and it turned out exactly as I’d hoped for. Great craftsmanship and beautiful ring. He also provides great service in maintaining the ring quality, checking the setting integrity and cleanings.”
“Sergio is absolutely amazing! He took care of everything step by step to ensure I got the exact most perfect ring I could dream of. I cannot recommend him enough! Also…she said yes!”
“Sergio is a very experienced and talented jeweller. He communicated well with our needs and responded quickly. I appreciate his design, jewel choice, and craftsmanship. His rings are of great value, and I recommend buying engagement and wedding rings from him!”
“Thank you Brad! I truly appreciate your kind words & support.It was a pleasure working on your Wife’s engagement & wedding rings and I am thrilled to hear that you are happy with the quality & value . Wishing you both a lifetime of happiness,hope to see you again soon! Sergio”
“Hi Andrew, Thank you so much for your kind words! It was a pleasure working with you to create your custom engagement ring. I’m thrilled to hear you’re happy with the final result. Wishing you both all the best! Warm regards, Sergio”
“I had an amazing experience designing my custom engagement ring with Orosergio! The team was incredibly helpful and attentive, and the final result is absolutely stunning. I was also pleasantly surprised to find that they offer an upgrade option, allowing me to exchange the stones in the future if I ever want to. It’s such a great peace of mind to know I have that flexibility. Highly recommend this place if you’re looking for something unique and special!”
“Love the engagement ring I got for my fiancé, when I showed it to her she said it was exactly as she wanted it, the price was amazing and Sergio was very helpful throughout the whole process. He is great and will be getting my wedding bands with him too!!”
“Sergio went above and beyond for my husband and I. He did an amazing job with my dream engagement ring.Got my wedding band done by him as well. He also replaced and cleaned my everyday rings. The customer service was amazing and highly recommend you check them out. He has a great collection of pieces.”
“We had the best experience being served by Sergeo My cousins engagement ring was designed by him,. An amazing beautiful design, the best finishing, what a great setting, we all know that when it comes to diamond rings the setting should be done perfectly and this is what we got Can’t thank him enough for this outstanding piece”
“What a gem! I went to Orosergio Custom Jewelry for my custom engagement ring. Sergio was very knowledgeable and accommodating. This was my first time buying jewelry and his professionalism made this process such a pleasurable experience. The ring came out beautifully and everything I'd imagined it to be! I'm looking forward to working with Sergio in the future to get our wedding bands made. I would highly recommend anyone to go to Orosergio for your jewelry needs. Thank you so much Sergio!”
Every ring is designed from scratch — but these are the most popular starting points our clients bring to their first consultation.
A single diamond in a clean, minimal setting. The most timeless engagement ring style — designed to maximize the stone and let it speak for itself. Available in four-prong, six-prong, and bezel settings.
A center stone surrounded by a ring of smaller diamonds, creating the illusion of a larger diamond and adding brilliance. Single halo, double halo, and hidden halo variations available.
Three diamonds representing your past, present, and future. The center stone is typically larger, flanked by two complementary side stones. A meaningful and striking choice.
Intricate detailing inspired by antique designs — milgrain edges, filigree, and engraved shank patterns. We study period-correct techniques to create rings that feel authentically vintage.
Arched metal supports that elevate the center stone, creating a dramatic profile. The cathedral setting adds height and presence while keeping the diamond secure.
Tiny diamonds set into the band itself, adding sparkle from every angle. Pavé settings catch light beautifully and complement any center stone shape.
Lab-grown diamonds are chemically and physically identical to mined diamonds — the only difference is where they formed. Both are real diamonds, both are graded by GIA, and both are stunning in a custom setting.
At OROSERGIO, we offer both natural and lab-grown diamonds because we believe the right choice depends on your priorities, not ours. Lab-grown diamonds cost 60–80% less than comparable natural stones, which means you can go bigger on the stone, invest in a more intricate setting, or save the difference for your future together.
Natural diamonds carry the romance of a billion-year geological journey and generally hold their value better on the secondary market. During your consultation, Sergio will show you both options side by side in natural light — most clients are genuinely surprised at how identical they look.
Our craftsmen bring decades of experience, blending old-world savoir-faire with contemporary design and modern techniques. Everything is made under one roof in downtown Toronto.
Most custom engagement rings are delivered in 2–3 weeks — not months. Because we design, render, and handcraft in-house, there are no outsourcing delays.
We obsess over the small things — prong placement, band thickness, gallery detail — because those are the things you notice every day for the rest of your life.
When everything is done in-house by a CJA-certified Master Goldsmith, you receive exceptional quality at a better value — without paying retail markups.
Gold is available in yellow, white, and rose — all three are the same metal alloyed differently for colour. The real choice is between platinum, 14K gold, and 18K gold.
The most durable precious metal. Naturally white, hypoallergenic, and develops a distinguished patina over time. Heavier feel on the finger. Never needs re-plating. The premium choice for clients who want their ring to last generations without maintenance.
Premium — most durableThe most popular choice for engagement rings. 58.5% pure gold, balanced with alloys for everyday durability. Available in yellow, white, and rose. Slightly more resistant to scratches than 18K. White gold is rhodium-plated for a bright finish (complimentary re-plating at OROSERGIO).
Most popular — best value75% pure gold with a richer, warmer tone than 14K. The higher gold content gives it a deeper colour that many clients prefer, especially in yellow gold. Slightly softer than 14K, making it a better canvas for intricate detailing. Available in yellow, white, and rose.
Richer colour — luxury feelThe richest white gold colour available — often called "super white." 19K white gold achieves a brighter, more naturally white tone than 14K or 18K white gold, reducing the need for rhodium plating. A premium option for clients who want the whitest possible gold without choosing platinum.
Super white — richest white goldAlso known as Portuguese gold, 19K yellow gold has the deepest, warmest yellow tone of any gold alloy. With 79.2% pure gold content, it delivers an unmistakable richness that 14K and 18K cannot match. A favourite among clients of Portuguese heritage and anyone who appreciates the deepest gold colour.
Portuguese gold — deepest yellowSpecial Moments
Start with a free consultation at our downtown Toronto studio or online. Share your vision, browse inspiration, and discuss your budget. No pressure, no obligation — just an honest conversation about what you want.
Select your diamond (natural or lab-grown), choose your metal, and refine the setting style. Sergio creates a 3D CAD rendering so you can see exactly how your ring will look before production begins.
Master Goldsmith Sergio Chamahyan handcrafts your ring in our Toronto studio using ethically sourced materials. Every detail is inspected throughout the process — from stone setting to final polish.
Your finished ring undergoes a final quality inspection, is professionally photographed for your records, and presented in OROSERGIO packaging — ready for the moment you have been planning.
In the heart of downtown Toronto at Queen and Victoria, Sergio's Studio is where your dream engagement ring becomes a reality. Everything is done in-house — design, CAD rendering, stone sourcing, and hand fabrication — by a CJA-certified Master Goldsmith with 30 years of expertise.
Book an AppointmentCenter diamonds of meaningful size come with an independent certificate documenting the exact carat weight, cut grade, colour, and clarity — typically GIA for natural diamonds and IGI for lab-grown, though the grading lab can vary by stone. Smaller accent stones are not individually certified. Independent appraisals for insurance are available on request, giving you complete confidence in your purchase.
We exclusively partner with diamond dealers who are members of the Canadian Jewellers Association (CJA) and adhere to the Kimberley Process — an international framework that prevents conflict diamonds from entering the supply chain. Every natural diamond we source has a documented chain of custody. Our lab-grown diamonds are produced in certified facilities with verified origins.
Custom engagement rings at OROSERGIO start from $4,000, with most rings falling between $4,000 and $20,000 depending on the diamond type, carat weight, and setting complexity. Lab-grown diamond rings typically fall between $4,000 and $8,000. Natural diamond rings start from $8,000 and can exceed $20,000 depending on the centre stone. Gemstone rings (sapphires, emeralds, rubies) range from $4,000 to $8,000. We provide a detailed quote during your consultation — no hidden costs, no surprises.
Most custom engagement rings are completed in 2 to 3 weeks from design approval — significantly faster than the 6 to 12 week industry average. This timeline is possible because Master Goldsmith Sergio Chamahyan handles every stage in-house at our downtown Toronto studio, eliminating outsourced manufacturing delays. If you have a specific proposal date, let us know and we will accommodate your timeline.
Lab-grown diamonds are chemically, physically, and optically identical to mined diamonds. The difference is origin: natural diamonds formed underground over billions of years, while lab-grown diamonds are created in weeks using High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD) techniques. Lab-grown diamonds cost 60-80% less than comparable natural stones. Both are graded by GIA and both are real diamonds.
Absolutely. We specialize in setting client-supplied diamonds — whether heirloom stones, personally sourced gems, or diamonds purchased elsewhere. During your consultation, Sergio will assess the stone and recommend setting options. All client diamonds are fully insured while in our care. Visit our Bring Your Own Diamond page for details.
Whether you have a clear vision or just a feeling, we'll help you design an engagement ring that captures it. Book a consultation at our downtown Toronto studio or connect virtually — Sergio will guide you through diamonds, settings, and styles until every detail is exactly right.
Book an Appointment
