Costume Jewelry Collectors Int’l LLC Logo

A Global Community of Costume Jewelry Enthusiasts

Costume Jewelry Collectors Int’l LLC (CJCI) is a global community dedicated to the study, enjoyment, and promotion of collectible costume jewelry. CJCI brings people together through conventions and social networking. We also fulfill our mission of sharing costume jewelry information and resources through our website free of charge.

CJCI does not operate as a non-profit entity, however, our online resources are made possible by generous donations from the collecting community. This includes keeping the RCJ Marks Guide online as well as hosting many other educational features pertaining to costume jewelry collecting. Many of these, in fact, have been contributed by our community members and we’re pleased to house their ardent research.

Since CJCI was founded in late 2009, seven weekend-long conventions have been held hosting attendees from around the globe. We no longer charge a membership fee but do encourage those who want to participate in future events to sign up for the CJCI mailing list through our website and to follow our page on Facebook.

For information on CJCI shows, email (


P.O. Box 446

Benicia, CA 94510

Pamela Siegel, Co-Founder