Cushion-cut Yellow Sapphire Engagement Ring in 18ct Yellow GoldThis yellow sapphire engagement ring was set with a 1. 24 carat gemstone. The 18ct yellow gold ring features a shaped band set with four diamonds. This ring is based on one of our original vintage style rings from the 1930s and customised by teaming the square cushion yellow sapphire together with yellow gold. The visual effect is stunning. To ask any questions or visit us in London, please telephone 020 7193 4412 or email.