As the oldest jeweler located in NYC’s famous Diamond District, we noticed more and more confusion about what’s out there. What started as sharing tips and tricks with family and friends who were overwhelmed by the diamond market, quickly turned into our calling.
Whether you’re investing in your first piece of jewelry, or preparing to propose, we want to arm you with our 60 years of behind-the-scenes knowledge on pricing, sourcing and designing. We'll share everything you need to know to be the smartest, most conscious diamond buyer you can be.
Welcome to our clear, bright world of transparent pricing, superior customer service, and above all else — diamonds without any compromise.
Try rings in-person. See diamonds up close and personal. Meet with our Diamond Specialists at our storefront in New York City's famous Diamond District.
Whether you're in a different timezone, or are just practicing COVID-19 safety precautions, our Diamond Specialists are ready to meet you virtually.
Whether you’re investing in your first piece of jewelry, or preparing to propose, we want to arm you with our 60 years of behind-the-scenes knowledge on pricing, sourcing and designing.
We'll share everything you need to know to be the smartest, most conscious diamond buyer you can be.
For over 60 years, we've been diamond cutters and manufacturers. We will explain pricing with the ultimate transparency.
Every piece we create is designed, handcrafted, and set by our Ultimate Diamond approved jewelers.
Have a special design in mind? We can help tailor make your one-of-a-kind piece.
Whether you're interested in earth-grown or lab-grown stones, we have the largest selection available.
If I could give this dealer a 6 stars out of 5, I would. My soon to be fiancee and I cannot recommend Diana and the staff at Ultimate Diamond Co enough - they will show you the attention, the clarity, the honesty, and the pricing you need to make what normally would be a very stressful purchase one of the most enjoyable and confident purchases you'll ever make!
— Brian L.
They are the best in New York City, and probably the country. My fiancé and I spent a lot of time researching diamonds, the industry, and different places to look for her engagement ring. We came across Ultimate Diamond and decided to stop by due to the great reviews. Extremely professional, knowledgeable, and has an attention to detail unlike any other jeweler we experienced. During our first visit we were just browsing. We never felt pressured or ignored even though we weren't serious yet.
— Anthony P.
Amazing experience, couldn’t have asked for anywhere or anyone better than Bill and his team. The experience is so different than many other places you’ll go where they give you a price and tell you that you “have to trust the person you’re buying from,” even though you’ve just met them. The people at Ultimate will walk you through the pros and cons of every bit of the process and make you realize that they’ve built your trust by being knowledgeable and honest. I’d highly recommend buying an engagement ring or any piece of jewelry here.
— Vinay G.