A black and white photo of a city street at night with tall buildings, cars on the wet road, and illuminated signs, including one for diamonds and another for a jewelry store named Beaudis.

Our story begins in 1946, in the heart of New York City’s diamond district.

I. Morgenstein is a family-owned diamond and colored stones trading business based in the heart of New York City’s diamond district. For nearly eight decades, the business has been built on long-standing relationships, careful selection, and a disciplined approach to quality.

Today, the company is led by Ronnie Morgenstein, continuing a tradition shaped by generations of experience in the trade. From calibrated assortments to exceptional individual stones, every diamond and colored stone is selected with the same focus on accuracy, consistency, and trust.

An older man with glasses using a magnifying glass to carefully examine a small watch part.

A measured, professional approach

Our business is deliberately personal. We work closely with our clients, many of whom we have partnered with for decades, and we take the time to understand their specific requirements. At the same time, our scale and network allow us to meet a wide range of trade needs, reliably and efficiently.

Precision matters. Our descriptions are accurate and conservative, our valuations informed by deep market knowledge, and our standards applied consistently, regardless of size or price. This approach ensures that every stone we supply reflects the confidence and care our clients expect.

A pile of cut diamonds being weighed on a scale

Built on trust and long-term relationships

Reputation is everything in this industry. Ours has been earned through professionalism, discretion, and an unwavering commitment to integrity. Whether sourcing diamonds, handling asset liquidation, or providing professional services, we approach every transaction with the same level of care and responsibility.

It is this combination of experience, discipline, and trust that continues to define I. Morgenstein today.

Close-up of two hands shaking, one hand with a diamond ring and a gold bracelet, and the other with painted nails, against a blurred background.

Our Values

Precision

Every stone is selected, described, and valued with accuracy and care.
Integrity

Our approach is conservative, transparent, and built on long-term trust.
Relationships

We work closely with our clients, many of whom we have partnered with for decades.