Are rubies suitable for engagement rings?

Yes, rubies are a really excellent option and also quite durable for engagement rings. If you look at the Mohs hardness scale, they score a 9, and they are second only to diamonds, so they stay pretty protected against scratches and the usual daily wear.

Besides the strong physical toughness, rubies do not have cleavage, meaning they are not likely to split or fracture when struck along certain internal planes. That makes them generally less likely to chip compared to emeralds. Also, their vivid red colour is often linked with passion and love, which brings extra emotional weight. When you are choosing a ruby for everyday use, make sure the stone has not been structurally compromised by heavy glass-filling treatments.