Signed Collectible Jewelry, Colored Gemstones, and Natural Pearls
Provockative Gems is an internationally respected source for signed collectible jewelry, exceptional natural gemstones, and natural pearls. Established in 1990, the firm brings decades of expertise to the collecting and trading of important jewels, guided by deep market knowledge, global experience, and an uncompromising standard of quality.
Archive
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![Donald Claflin for Tiffany & Co.]()
Tiffany & Co. Ring
18KYG, Lapis Lazuli & Diamond Ram's Head Ring by Donald Claflin for Tiffany & Co.
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![Cartier Brooch]()
Cartier Brooch
18KYG & Diamond Brooch by Cartier, c1950
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![Bulgari Bracelet]()
Bulgari Bracelet
Coral, Onyx & Diamond Bracelet by Bulgari
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![Colombian Emerald Ring]()
Colombian Emerald Ring
Colombian Emerald & Diamond Bypass Ring.
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![Bulgari Brooch]()
Bulgari Brooch
Platinum & Diamond Bow Brooch by Bulgari
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![Bulgari Earrings]()
Bulgari Earrings
Coral & Diamond Earrings by Bulgari
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![Cartier Brooch]()
Cartier Brooch
Art Deco Jabot Pin by Cartier
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![Custom Diamond Ring]()
Custom Diamond Ring
Custom 3.06ct Oval Diamond Ring
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![Van Cleef & Arpels Bracelet]()
Van Cleef & Arpels Bracelet
18KYG & Diamond Bracelet by Van Cleef & Arpels
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![Van Cleef & Arpels Brooch]()
Van Cleef & Arpels Brooch
Platinum, Ruby & Diamond Brooch by Van Cleef & Arpels
Established in 1990
Founded by Alex Vock, Provockative Gems reflects a career shaped by international training, extensive travel, and direct engagement with the world’s most important sources, collections, and institutions. What began as a trusted wholesale resource for designers, manufacturers, and retailers has evolved into a globally recognized authority on rare and significant jewels.
With a particular focus on signed pieces, natural pearls, and exceptional colored stones, Provockative Gems is known for its disciplined eye, integrity in sourcing, and long-standing relationships across the international jewelry community. The firm regularly advises collectors, institutions, and industry leaders, drawing on a network built over decades of collaboration and trust.
Provockative Gems operates with a strong commitment to responsible business practices and ethical sourcing, adhering to Responsible Jewellery Council standards and due diligence protocols. Every piece is approached not simply as a commodity, but as part of a larger historical, cultural, and economic context—intended for serious collectors who value knowledge as much as rarity.
Working with Provockative Gems reflects a shared commitment to expertise, responsible sourcing, and a serious approach to collecting, informed by history, scholarship, and global market knowledge.
Meet the Team
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![Alex Vock]()
Alex Vock
FOUNDER
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![Donna Vock]()
Donna Vock
CO-FOUNDER
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![]()
Lindsey Miller
VICE PRESIDENT & COLORED STONE BUYER
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![Elias Vock]()
Elias Vock
SENIOR SPECIALIST & COLORED STONE BUYER
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![Charlotte Singer4]()
Charlotte singer
OPERATIONS MANAGER & GRADUATE GEMOLOGIST
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![Alexandra Silver]()
Alexandra Silver
MARKETING DIRECTOR
Upcoming Exhibitions
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February 2 – February 6, 2026
Tucson Convention Center · Tucson, ArizonaAn industry-only gemstone fair held during Tucson Gem Week, known for responsibly sourced stones and exceptional colored gems.
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March 4 – March 8, 2026
Hong Kong Convention and Exhibition Centre · Hong KongOne of the world’s premier fine jewelry trade fairs, showcasing finished jewelry, exceptional gemstones, and global design from leading international exhibitors.
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March 26 – March 30, 2026
Miami Beach Convention Center · Miami Beach, FloridaOne of the world’s leading antiques shows, featuring fine jewelry, decorative arts, and collectibles from international dealers.
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May 7 – May 10, 2026
Palexpo · Geneva, SwitzerlandA curated international fair dedicated to fine jewelry, historic gems, and contemporary design, with a strong focus on education and craftsmanship.
Work with us
Inquiries are welcome regarding our current collection, sourcing of exceptional gemstones, or private acquisitions. We work with discretion and thoughtful attention.
We are members of the Responsible Jewellery Council (RJC) and the American Gem Trade Association (AGTA).
Contact
Visit us
28 W 44th St #910, New York, NY
By appointment only
71 Elm St Suite 201, New Canaan, CT
By appointment only