A late Renaissance Western European gold and enamel wedding or betrothal ring

A late Renaissance Western European gold and enamel wedding or betrothal ring, c. late 16th century, the high quatrefoil bezel is rubover-set with a single oval foiled ruby or pink sapphire, rising from a square stepped base decorated with white and black enamel, the double scroll shoulders with red enamel and centred with a quatrefoil of blue enamel dots, size J

For a similar example see Chadour-Sampson, B., Hindman, S., Rings Around the World, (Les Eluminures: 2006), p. 108