Yellow gold is one of the most popular choices for engagement rings but it is relatively a soft metal when compared to others. Having said that, the karat of the gold has a significant impact on the longevity of your ring. For instance, 14kt and 18kt yellow gold rings are more durable than those made up with 22kt or 24kt, because of their mixed composition using different alloys. While none of these metals are too soft for crafting a jewelry piece, it all comes down to what you think would best serve your taste and needs.