20th century 10K bi-color Blue Sapphire full eternality ring s5.5 2.4g JR9946

Antique 20th century 10K bi-color Blue Sapphire full eternality ring
A row of paste natural Blue Sapphire gemstones in the center,
Diamond cut texture surface
4.6mm wide, ring size 5.5, weighs 2.4 grams, no hallmark, tested for 10K