We can't keep up.

Engagement rings change a lot and that's why experts often recommend going for a classic cut and shape which will stand the test of time. However, not everyone is following this advice as coloured gemstone rings are more popular than ever before. 40 percent of the rings sold at Gemporia, a British jeweller, so far this year featured coloured stones instead of the traditional diamond and this marks a major change. According to Who What Wear, this is a 15 percent increase from 2017 proving that the demand for various gems is increasing all the time. At the moment, the number one gem requested by those purchasing engagement rings is tanzanite, a violet coloured gemstone which you can see below. Other gems in demand include emeralds, rubies and sapphires which saw a resurgence after Princess Diana chose a 12-carat sapphire engagement ring. Prince William used his late mother's ring to propose to his wife, Kate Middleton the Duchess of Cambridge and the ring has become an iconic heirloom which has been photographed continuously over the years. The below Instagram posts feature some of the options available for gemstone engagement rings and we think you'll agree that they're pretty fab. It's clear this is one trend that has staying power...