Carelle has designed an array of rings with different gems that can be worn individually, but are meant to be worn stacked. This pretty yellow sapphire and diamond ring would look great on its own (it would also make a pretty and different engagement ring); it is set in 18k yellow gold with a 5mm sapphire and a diamond weighing .02 carats. Retails for USD $890 and can be purchased on the Carelle site.