Love all of them! Rubies, amethyst, topaz, sapphires of all colors, citrines, tourmaline, etc!!! I even prefer it more than diamonds now! If DH had given me one for an engagement ring I wouldnt have complained. But why isnt it popular as an engagement piece? They are semi-precious stones too and cost like 1/20 the price of a diamond, and are prettier IMO especially when set with the tiniest diamonds.