Item: Vintage 10K Yellow Gold Blue Spinel Initial C or G Mens Signet Ring. This is stamped and tested 10K gold. The stone is testing as Spinel - looks lab created to me. The small stone is a diamond. The ring box is not included in the sale of the ring.
 
Measurements: Size 11.75. It weighs 4.04 grams.
 
Condition: Vintage, previously owned. There is one tiny nick on the edge of the blue stone. There is a little movement of the stone in its setting.