18K Gold And Russian Natural Blue Zircon And Diamond Ring C1970.
The partial English gold hallmark can be found to the inside of the band, this is where you see the London assay office mark. The Blue Zircon is in good order & is approx 0.5 carats in size.
Size UK J+, US 5 or internal diameter 1.6 cm or 0.62 inches.
Width across the head 0.8 cm or 0.31 inches.
Weight 3.8 grams or 2.4 Pennyweight.