John Marmo Diamonds - By Appointment Only — Local services in Charleston

John Marmo....I can't give him enough praise. His personal interaction is #1 most admirable #2 his craftsmanship and wealth of information are stellar. No matter what a person's budget he does not pass judgment he still treats you with the highest regard and respect. He doesn't push the most expensive diamond or jewelry on to his customers. He tells you honestly where you can cut back and still get an amazing piece. John made my engagement ring and it was designed personally for me and is stunning I get compliments daily. I just got married and he too, designed my wedding band which he too personally came over to design and again he did not disappoint. I wouldn't reccomend any other jeweler or diamond conosouer nor would my husband and I purchase any other jewelry from another person or store. He also, designed my moms ring (which her original set was stolen) and he again, wowed everyone. She too gets compliments on her beautiful ring. Bottom line, John Marmo is the best, always consider him before anyone else. Thank you John for making my engagement and marriage so special and personal. Also, he stands by his work, that if for any reason something he will honor his work and make right. We haven't had to test this out, but I am confident...

I met John serendipitously during a group tennis lesson in Charleston, where he introduced himself and handed me his card. The timing was perfect—I was searching for an engagement ring but struggling to find someone who offered both expert guidance and meaningful customization.

From our very first conversation, John distinguished himself through his meticulous attention to detail and thoughtful approach. He asked insightful questions, listened carefully, and translated vague ideas into a clear, creative vision. Throughout the process, he was communicative and accessible—always willing to meet, answer questions, or talk through options with patience and clarity. Over the course of several months, I also came to learn more about his family history in the jewelry business and his genuine passion for the work. The result was a bespoke engagement ring that reflects not only my vision but also John’s deep care and precision.

For anyone seeking a private jeweler with integrity, expertise, and a truly client-centered approach, I recommend John without hesitation… I hope to need something else down the road to get the pleasure of working...

My husband got my engagement ring from John 23 years ago. I felt my setting was dated, chunky and my beautiful diamond seemed lost after all these years. Over the years John and I had talked about changing the setting at some point. When I finally made the decision to do it I called John and made an appointment with my ideas. John was right there, he had listened carefully over past appointments and was able to help me navigate through my thoughts of what I was looking for and what changes I wanted and should make. With John’s guidance we broke it down, came up with a plan and he nailed it! I am looking forward to and loving that I will be able to continuously change up the setting with the remaining diamonds from my original ring still to be set in different bands! My husband absolutely loves it, as do I!

Thank you John for bringing new life and sparkle to my original diamond!

Today John brought back my original wedding band that was connected to my original engagement ring and it was resized. Put it together with my new bands and I’m in love again! ...