Mondiamo, your trusted resource for selling engagement rings, diamond jewelry and loose diamonds
At Mondiamo we believe that you should feel good about selling your diamond jewelry; not overwhelmed, uneducated or uncomfortable.
Our team of experts brings together deep industry experience, a rigorous scientific approach and a global network to maximize the value of your diamond jewelry.
Our offices are based in the Midtown West neighborhood of New York City, and for your convenience we welcome appointments for those looking to submit in person. Learn more about Mondiamo’s process, meet the team and receive a same-day offer for your diamond jewelry. Interested in visiting? Call our client care specialists to schedule your appointment.
We've teamed up with Blue Nile, the largest and most trusted online diamond jewelry marketplace globally, to provide you a transparent, straightforward value for your diamond jewelry.
Meet our expert team
Director of Client Care
“With almost 10 years of experience working with luxury brands, I know the importance of providing an elevated and tailored experience for our customers. Building trust and strong relationships are key to me, so Mondiamo’s unique approach to helping customers sell their diamond jewelry is a perfect fit.”
Senior Gemologist, G.G.
“Every customer is unique. I love taking the time to get to know each of them, to really understand their needs, and to educate them so they can feel good about selling their diamond jewelry."
Lead Diamond Buyer, D.G.
“Diamonds have always been part of my life. My grandfather was a jeweler for the royal family, and the business has passed down through the generations. Having been in the industry for so long, I know the best ways to help our customers improve the value of their diamond – whether it’s selling within a certain market or recutting the diamond to improve quality.”
Sales Operations Lead, G.G.
"What I really love about my role is that I see the client’s diamond come full circle, from the inspection process to getting them ready to send the final offer. It’s amazing to be part of the client’s journey and to guide them through what can be a stressful or overwhelming situation. I work with such a talented team that really put our clients’ happiness first."
Client Care Specialist, G.G.
“Our customers’ experience is the highest priority at Mondiamo. As part of the client care team, I love being able to leverage my knowledge and skills as a gemologist to help our customers better understand diamonds and their value.”
Lead Inventory Manager
“With more than 30 years of experience in the industry, I’ve learned that the jewelry business is all about trust. Trust among colleagues, trust from our customers – without any of this, I wouldn’t be able to do my job. I have tremendous respect for our customers and their diamonds, because they are putting their faith in me that their diamond jewelry will always be handled with knowledge and care.”
Why the hummingbird?
Our desire to focus on the good things in life is the reason we chose the hummingbird as our logo.
The hummingbird flies over 3,000 miles in its lifetime, boldly overcoming life’s challenges in search of the sweetest nectar. As you sell your diamond jewelry to seek out the sweeter things in your life, we aim to assist in your journey in a positive, friendly and transparent manner.
We want nothing more than for you to feel great about the sale of your diamond jewelry and, more importantly, what comes next, so we will always be attentive and respectful of your needs and concerns.
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