Consider us your in-house diamond specialists.

Experience you can trust; quality your customers will treasure.

Our Certified Diamond Services

What if you had your own diamond department, fully staffed by GIA Certified Diamond Specialists with decades of experience in jewelry design, manufacturing, bench work, and stone setting? Imagine the efficiency, the convenience, the consistency, the value — and, most important, the quality — that in-house GIA certified diamond specialists could deliver. With K. Rosengart, you can bring that business-building vision to life.

Consider us your resident diamond experts; our range of certified diamond services and attention to client needs transcends that of a typical diamond dealer. We are fully invested in your success — and will help you build it, one stone at a time. Order your Melee Diamonds Wholesale for your jewelry.

Partnerships As Strong as Diamonds

We offer a full array of diamond services that enable our valued clients to focus on what they do best: delivering products that their customers will cherish for a lifetime. They can do this with confidence, knowing that we will supply diamond melee that meets their exact specifications — and provide personalized support that exceeds their expectations.

Our goal is not to sell a parcel of stones; it is to forge strong, and sustainable, relationships with designers, manufacturers, retail store owners, buyers, and other professionals. By delivering consistent quality and pricing, and by paying meticulous attention to your unique needs, we seek to become trusted partners.


Brilliant diamonds come from brilliant cutters. Our team is renowned for their precision and artistry in this intensive field.


Our diamond melee services at K. Rosengart, include the industry’s most precise diamond sorting available.


Get piece of mind as to the authenticity of your diamonds with K. Rosengart’s diamond analysis service.

CAD Designed
Diamond Jewelry

We will help you realize your most bold, beautiful design ideas with our custom CAD jewelry design services.

Bagging and

Whether you need 1 diamond or 100 cts we will bag according to your exact needs.  As always, 2nd day shipping is FREE.

Setting and

Send us your castings or your CAD design. We will set polish and finish the piece for you!

Insurance Claims
& Appraisals

Whether you need your jewelry appraised, or are in need of jewelry repair through your insurance, our experts are here to help!


Send us your diamond jewelry in need of repair. We will repair it for in a timely manner, and will polish and finish the piece for you!

Loose Diamond

When it comes to your loose diamond supply, trust our GIA-certified specialists to meet your expectations every time.

At K Rosengart, we pride ourselves on the quality of our diamond melee. But of equal — or even greater — importance is our ongoing commitment to outstanding service. Our staff is as friendly as they are knowledgeable, as helpful as they are experienced. This caring and competence is coupled with prompt delivery and competitive prices.

Not all diamonds are cut with equal precision and skill; and not all diamond supplier services offer the same quality and consistency. Demand the finest melee and impeccable service. And receive it with every order, with every stone. K. Rosengart: we are your dedicated diamond specialists.