Ruby rings command a vivid presence, prized for their intense colour and symbolic associations with passion, power and protection. Treasured since antiquity, rubies are among the rarest gemstones, with the ‘pigeon blood’ variety being the most sought-after. This hue features a bold red with a slight blue tone — Christie’s sold the 15.04 carat Crimson Flame ruby ring for HK$141.8 million in 2015.