Welcome to Tamsen Z
Precious Gemstones For Everyday
Give Yourself A Little Sparkle
About Us

About Us


Founder - Designer - Philanthropist

Ann Ziff has had a life-long love affair with jewelry and has a connoisseur’s eye for the world’s most exceptional gems.  As a child, Ziff was fascinated by the elaborate jewelry worn by her mother, famed American opera singer Harriet Henders.  Encouraged by her late husband, William B. Ziff, Jr., she began buying stones and creating her own original jewelry.  From rare Australian black opals to prized Paraiba tourmalines and extraordinary Colombian emeralds, Ziff’s collection has evolved into one of the world’s preeminent collections of privately owned gemstones.  Tamsen Z captures the exquisite beauty of these stones in handcrafted pieces that are truly one of a kind.

Ziff designs each unique piece herself, choosing and arranging the stones, sketching the designs by hand, and she personally strings every gold, pearl and gem bead necklace herself.  Her artistry lies in the mixing of color, texture and material: sparkling black diamonds strung with sapphires and handmade gold beads, rainbow-hued black opals surrounded by electric green demantoid garnets and vivid blue haüynites, and shimmering South Sea pearls set off by diamonds and aquamarines.

A native New Yorker, Ziff is as passionate about giving back as she is about jewelry design. Her philanthropic work includes serving as Chairman of the Metropolitan Opera, for which she designs one-of-a-kind pieces featuring crystals from the opera house’s famed starburst chandeliers.  She also serves as Vice Chairman of Lincoln Center for the Performing Arts and of Artist Tribe Foundation, and sits on the boards of American Museum of Natural History, Fairchild Tropical Garden, Los Angeles County Museum of Art, Los Angeles Opera Company, New York Restoration Project, Sing for Hope, and World Science Festival. Ziff was Co-Founder and Founding Chairman of Smile Train and is the Founder and Producer of the Caribbean Community Theater in St. Croix. 

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A psychiatric social worker for many years, she continues to work to help children in need and bring culture and arts into the lives of young people. She has a Masters of Social Work from NYU and a Masters in Music Therapy from Temple University.  Ziff is a Visiting Professor at Boyer College of Music and Dance at Temple and has been a guest lecturer at Worcester College and the Said Business School at Oxford University. She was awarded an Honorary Doctorate in Humane Letters from the Juilliard School and an Honorary Doctorate in Humanities from Wittenberg University.   

Ziff resides in New York City, where she can be found dreaming up ever more dazzling creations for Tamsen Z.

Schedule an appointment at our private showroom located on the Upper East Side in New York City.

Schedule an appointment

For additional information, contact;



E: [email protected]

T: (212) 360-7840

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