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K. Rosengart
Years of Experience

Karen Rosengart ,

GIA Diamonds Graduate

Karen holds a Bachelor of Fine Arts from the School of the Art Institute of Chicago (SAIC). She also has a Craft Certificate in Jewelry from the City and Guilds of London Institute, where she studied jewelry design and traditional jewelry manufacturing. Karen is a GIA Diamonds Graduate.

After graduating from SAIC in 1988, Karen sat at the jewelers’ bench. She learned stone setting from her father and specialized in pavé setting. Karen then worked for Tiffany & Co., managing the engagement jewelry product category. She was instrumental in helping launch the original T&Co. Diamond Certificate Program and co-authored T&Co. ‘s original How to Buy a Diamond booklet.

In early 1997, Karen founded KR Diamonds, Ltd., utilizing her creativity and business acumen to quickly gain a reputation for high-quality standards with unparalleled client support. After 12 years, Karen left KR Diamonds and created K. Rosengart, whose focus continues catering to designers and manufacturers.

In May of 2023, K. Rosengart became a subsidiary of Niru Group. Karen’s mission remains to be reliable in service, Precision in product offering, and integrity in the supply and sourcing of natural diamonds.

Arielle Rozenfeld ,

GIA Graduate Gemologist, Jewelry Design and Technology

Arielle began her career by attending the Gemological Institute of America, where she completed the Graduate Gemologist and Jewelry Design and Technology programs. With almost a decade of experience in the gemstone and jewelry industry, she joined her family business, K. Rosengart, in 2018. Arielle now oversees the sourcing, buying, and operational aspects of K. Rosengart while managing all client relationships. With a love for gemstones and jewelry, she continues expanding her industry knowledge and has picked up wax carving as a hobby!


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