Yellow and white gold ring with amethysts, diamonds, tourmaline and garnet

18k yellow gold ring with 12 amethysts, 1 garnet and 1 pink tourmaline set in 18k yellow gold and 22 brilliant cut diamonds, approx. 0.88 crts in total, each set in 18k white gold. Diamonds are VVS/VS clarity, G/H colour, graded while in setting. Italy, 1950s/60s.