How to Identify Unmarked Costume Jewelry - Antique Trader
Antique and Vintage Jewelry Maker's Marks: A Collector's Guide - Invaluable
Vintage Costume Jewelry: Where to Begin | Barnebys Magazine
List of Costume Jewelry Designers and their Marks by Dr. Lori - YouTube
List of Costume Jewelry Marks, Designers and Values by Dr. Lori - YouTube
ALL jewelry makers mark identification | Hi guys, admin here, I created a sister group for selling jewelry, because no sales posts are allowed in this group
Jewelry Trademarks - "A" - Global Gemology - Rare Gems & Jewels