Vintage gold tone blue cabochon earrings

Vintage gold tone blue cabochon earrings Pierced earrings GUC, like new. Brought from a vintage boutique in France. Material: gold metal Cabochon: blue (may plastic) Width: 1.30 cm (0.51") Height: 1.70 cm (0.67") "PT" logo engraved on the back of earrings. They were made by Sphinx which was a British manufacturer founded in 1948.