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julio collazos profile picture
julio collazos
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Amazing work on my engagement ring very friendly service. Ty for the work
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Jessica Jones profile picture
Jessica Jones
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I had a wonderful experience selling my jewelry! The entire process was easy, professional, and stress freeI felt comfortable throughout the whole experience and was very happy with the offer I received . Everyone was friendly, honest, and knowledgeable. I would definitely recommend them to anyone looking to sell their jewelry. I will absolutely be back!
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K Price profile picture
K Price
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Great experience! Igor is very knowledgeable about his products. Fast, secure delivery. I am now a customer for life.
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John Costello profile picture
John Costello
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Buying an expensive watch online is scary considering the extensive network of scammers out there. I took every precaution I could before I purchased a Rolex from Igor at Diamond Source NYC. All said and done, Igor did everything he promised. He is honest, responsive and very respectful. Upon receipt of the watch it was exactly as described. Beautiful, unworn and 100% authentic. This guy can find anything you’re looking for. Thanks Igor.
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Deborah Chang profile picture
Deborah Chang
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Took a good amount of time to assess what I had and gave me top dollar matching and exceeding another estimate. They even allowed me to watch them count the cash given to me. I would come back to work with them again.
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Jeruel Trinidad profile picture
Jeruel Trinidad
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My overall experience in my first ever purchase of a luxury watch from Diamond Source NYC is nothing but a thrilling and exemplary experience. From inquiry to shipping, Igor has been outstanding in helping me from video inspection of the watch to next day shipping to my address. Most of all, I received a lovely watch, excellent like-new condition , excellent packing, and the watch itself is truly authentic complete with box and papers.
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Joseph Dalto profile picture
Joseph Dalto
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Igor is a good guy and has good business. If you want a watch this is the place to go to.. talked with multiple people to source a watch I wanted and he took care of me and was able to be competitive to everyone else’s prices. He is in it for the long term relationship opposed to trying to make the most off of someone initially. He’s earned a long term customer for life and will be getting every future watch from him. Look forward to growing the collection and having someone I know will not take advantage and will get me the best piece for the best price!
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Anelisa San Lorenzo profile picture
Anelisa San Lorenzo
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Igor is the best jeweler in nyc!
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Jason Smith profile picture
Jason Smith
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Outstanding Shop! Purchased a custom luxury watch and it was seamless. Igor's the man...quick sourcing, great communication and impeccable quality. I highly recommend these guys.
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Semi-Mount Engagement Rings: The Foundation of Your Custom Creation
Pre-Owned & New | NYC Diamond District
Questions? Call (212) 730-5959 or visit us at 20 W 47th St, Suite 401, New York, NY

For the client who has already found their perfect center stone or is looking to breathe new life into a family heirloom, Diamond Source NYC offers an extensive collection of premium semi-mount engagement rings. A semi-mount is a ring that is complete with side stones and intricate metalwork but lacks the center diamond, providing the structural and aesthetic foundation for your final masterpiece. Located in the world-renowned New York Diamond District, we provide the highest quality settings that allow you to take the creative lead. Our semi-mounts bridge the gap between ready-to-wear jewelry and fully bespoke design, offering a sophisticated path to a personalized ring that meets your exact specifications.


Unrivaled Versatility for Every Diamond Shape

One of the primary advantages of selecting a semi-mount from Diamond Source NYC is the sheer variety of head configurations available to accommodate different diamond geometries. Whether you possess a classic round brilliant, a sharp-cornered princess cut, or a romantic heart-shaped stone, our settings are designed to be adaptable. We offer semi-mounts with interchangeable heads or adjustable prongs, ensuring that your center stone—regardless of its carat weight or dimensions—is seated securely and displayed at the optimal height. This versatility ensures that your unique gem is perfectly integrated into a high-fashion setting that looks as though it was built specifically for that stone.

Elevating Heirloom Diamonds with Modern Settings

Many of our clients come to 20 West 47th Street with a cherished diamond passed down through generations that requires a more contemporary or secure home. A semi-mount is the ideal solution for modernizing an heirloom while preserving its sentimental value. At Diamond Source NYC, we specialize in helping you select a setting that honors the vintage character of an older cut—such as an Old European or Mine cut—while providing the structural integrity of modern New York craftsmanship. By transitioning an older stone into a new pavé, halo, or three-stone semi-mount, you create a beautiful bridge between your family’s history and your own future.

The Luxury of Precision Side-Stone Matching

At Diamond Source NYC, we believe that the "supporting cast" of diamonds should be just as spectacular as the lead. Our semi-mount rings feature accent stones—whether they are baguettes, pears, or micro-pavé rounds—that are hand-selected for their exceptional brilliance and color consistency. When you choose a semi-mount from our showroom, you are guaranteed that the side stones have been calibrated to the highest standards of the Diamond District. This attention to detail ensures that when your center stone is finally set, the entire piece exhibits a uniform, high-wattage glow that is the hallmark of a true luxury engagement ring.

Craftsmanship and Finishing Touches in Manhattan

The final step of the semi-mount process is the professional setting of your diamond, a task handled with precision by our on-site master jewelers. Beyond the stones, our semi-mounts are available in an array of precious metals including 14k, 18k, and the most durable platinum. We offer a variety of finishing touches, from high-polish surfaces to intricate hand-engraving and milgrain edging. By choosing a semi-mount at Diamond Source NYC, you are not just buying a ring frame; you are engaging in a professional jewelry-making process. We ensure that your center stone is set with the utmost care, resulting in a seamless, durable, and breathtaking piece of jewelry that is uniquely yours.