Vtg Theda Sterling Silver Marcasite Theda Star of David Necklace Charm pendant

Vtg Theda Sterling Silver Marcasite Theda Star of David Necklace Charm pendant. Produce in Rhode Island by Ideal MFG Co. This company began producing pieces in 1921. Since most Sterling Silver Jewelry up until the 1940s was stamped “STERLING” or “STER” or “STG" before the .925 was used, I would say this pendant was produced between 1921-1950.