Vintage 1960's 18 Karat Yellow Gold Saint Barbara Filigree Medal

Vintage 1960's pre-owned Saint Barbara medal in very good condition
Crafted of solid 18 karat yellow gold
Weighs 2.90 grams
Measures 0.86" in diameter and 1.14" top to bottom (including the bail)
Filigree design
Bail will fit up to 4mm chain or necklace
Marked 18K on the back and has a manufacturer's hallmark
Features a synthetic ruby
Has been polished and cleaned