We Are Your Diamond Concierge

Karen is rare in her attention to detail and ability to focus on the most important aspects of every request. Excellent makes, the finest color, and filling unusual calls make her integral to our business. Her team saves me time, period.

From .01ct melee to Certified centers to pain in the neck special orders, I make one call. I talk to Karen and it’s taken care of correctly and quickly. One stop shopping. She’s a peach!

From a manufacturing jewelers standpoint, Karen Rosengart is the best supplier of melle and loose diamonds I have ever come across. I have been manufacturing jewelry for 17 years and I have had many different suppliers of melee, none of which can match Karen’s professionalism and perfection. My orders are ALWAYS on time, each individual size of diamond is bagged and clearly labeled, her grading process is very tough (think GIA), and her prices are always consistent. With other dealers, they give you a great deal this week and next week the price per carat goes up. Karen’s prices are always stable and her quality is always consistent. She saves me time with her process of picking and bagging exact sizes, and her consistency in pricing makes it easy for me to quote prices on jobs. On top of that, when she tells you a quality, you can believe it. Since I found her, I have not had to look anywhere else for my melee needs.

[O]ur order was for 6 pieces of matching 1/4ct. diamonds for a custom designed pair of earrings; subsequent to that we received another request to duplicate the earrings for the woman’s daughter who was graduating. [I]t was a delight to have twelve perfectly sized and matching diamonds for these two projects [:] color, cut, and clarity could not have been better matched, and seeing as I’m the one who does the fabricating and setting, your efforts made my tasks easier.

I wanted to thank you for the oval diamonds for the eternity band. It turned out amazing. Your diamonds are always perfectly matched and worry free. In my 16 years as a bench jeweler, you are truly the best I’ve seen. I will continue to send you all my business.

Karen’s attention to detail and unbeatable customer care makes her the only choice for me. Hands down, when it comes to diamonds, I don’t think of anyone else.

Karen is so lovely to work with. Karen and her team make the process of ordering stones so easy and painless. We have always been impressed by the quality of their stones.!!!

After bouncing around from one diamond supplier to another over the years I finally found one supplier I could rely upon…. That person is K. Rosengart. They have consistent quality, grading accuracy, great prices and fantastic delivery/services which are always on point!!!!

Karen was extremely professional and an expert at her craft. Not only did she capture our vision she delivered above and beyond our expectation!

Karen, Since we’ve been ordering diamonds from you, our customers are amazed at the quality of our work, thanks for all the helpful service ! My advice to jewelers out there is , don’t wait ,climb on board, you’ll be glad you did ! I wish we would’ve years ago!

Thanks for everything you do. The 1 1/2 ct diamond earrings were spectacular! She loved them & I did too. Still reeling from the holiday as a one person shop is very time consuming. I’ll keep you posted as inventory is scheduled for end of of February. You guys are my #1 diamond source. Trusted Reliable and Exceptional Quality Merchandise EVERY time!
Thank you soooo much!