Sevan is the man! I had a very stressful experience looking for a diamond engagement ring before finding Sevan at AST Jewellery. He is a very likable and easy to speak to and gave me great advice through the whole process of designing a custom ring. He seemed more interested in creating a tasteful ring rather then selling me the largest diamond I could afford which was really appreciated. Also the rings he has on display are very well designed and crafted which left me confident I was in good hands. I had some ideas about creating a custom ring and he was able to take them and create a ring that went above and beyond my expectations. I am very pleased with the service and the ring I got at AST Jewellery and will definitely be returning to get wedding bands done or any other custom jewellery in the future.

Nate Fisher

I can’t recommend A.S.T Jewellery enough. Sevan is extremely knowledgeable, patient and friendly. He explained all of my options in terms of diamonds and left the decision entirely up to me while offering his expert opinion on each stone we looked at.
Sevan designed the ring exactly how I wanted and the finished product is beautiful and my fiance loved it. I received a 3D mockup of how the ring would look in advance of Sevan making it. A very nice touch.
Please do yourself a favor and visit AST rather than a store. The service you receive will be far and above what you will experience there and you will receive much better value for your money

Mark Dunne

A Google search for independent jewellers produced A.S.T. Jewellery along with a few others in Toronto. I was keen on ordering my engagement ring from someone who offered fair pricing, was honest, and produced quality craftsmanship. Upon meeting Sevan Tosun, I was impressed with his knowledge of diamonds, his competitive pricing and best value and quality as per my budget, and his generosity with his time. I then researched and met 5 other jewellers to make sure that Sevan was the real deal. He not only charged fairly but his craftsmanship was also the best. Sevan was wonderful in giving me very specific information about the stone including GIA certification etc., 3D imaging and mould of the ring I ordered. My fiancé, who was living in another city at that time gave me the freedom to choose any design within a budget and was more than pleased at the outcome of my beautiful and classical ring that was made so promptly. Sevan takes great pride in his craftsmanship and diamonds and we will most certainly have our wedding bands made at A.S.T. I haven’t gone in yet for resizing or any maintenance, but I imagine when that time comes, Sevan will be just as gracious, I’ll keep you posted. In the meantime, I will just smile widely and enjoy this exquisite ring that my wonderful fiancé has so lovingly given to me. Best wishes, Deb

Deb Mesh


Thank you for the kind wishes but more importantly, thank you for your wonderful services you provided me. Your work has definitely not gone unnoticed. My ring is very nice and I’ve received many compliements on it.

All the best and I look forward to doing business with you again…

Dustin Newberry

Hi Sevan,

I want to start off by saying,THANK YOU SOOOOOO MUCH FOR OUR BEAUTIFUL RINGS THAY ARE EVEN MORE BEAUTIFUL THAN I ORIGINALLY THOUGHT! They are stunning! I looooooooooooooove them!!you did a wonderful job!!


Dear Sevan,

Thank you so much for that beautiful necklace which you gave me today. It is really breathtaking. I am planning on giving it to my daughter on her 21st birthday. She always wanted a diamond necklace…..and now she will have one. What a fantastic prize to win from Mix 99.9!


Hi Sevan!

It’s Lyja, you know, the one who fell in love with the ring last night. I’m even more sure than I was last night, it’s the ring for me!!! I was so happy to see it on your website!! Im sure lots of people will fall in love with your gorgeous jewellery.


Hi Sevan!

Just wanted to let you know that everything went amazingly well with my proposal and engagement etc… She loved the ring, as well as anyone else who has seen it. Everyone comments about the beautiful design and craftsmanship. Thank you very much for making the whole process so smooth.

Mark Rawlinson

“I am extremely happy with the service I received from Sevan at A.S.T. Jewellery. In short, the ring is beautiful; it is everything I’d hoped for. Beyond craftsmanship, what also distinguishes Sevan is the quality of his service. At all points through the process, his commitment to customer satisfaction shone through. After months exploring Tiffany’s and Burke’s, endless hours on Blue Nile and other websites, I was extremely happy to find A.S.T. Jewellery before completing my ring. With so much at stake, there is no substitute for the guidance and advice of a trustworthy, knowledgeable professional. Sevan is such an individual and he has well-earned my business for years and decades to come.

Kevin Seabrooke, P.Eng.

“I will get to the point immediately about the greatest purchase experience of my entire life.

I just got engaged 2 days ago and gave my fiance the most beautiful ring I have ever seen….

Not only was the final outcome better than I could ever expect, but the whole process from start to finish was simply outstanding to say the least.

I have been shopping for an engagement ring all across ontario for about a year now. When I met Sevan, we spent a little over an hour regarding proper diamond selection. He educated me more in that little time than I had obtained in the whole year of shopping from store to store….

I have seen many rings and many stones…. Sevan was so detailed and precise that the decision to buy my engagement ring was from him almost instant.

I cannot express in words how happy I am with AST, and I would gladly give my personal email address to refer Sevan and to discuss anything about diamonds and my experience. (

Since I am now… an expert. 🙂

Completely unreal, Sevan.