Diamonds are stones more used in engagement rings today, usually colorless diamonds. They are very durable, with a hardness of 10 on Mohs scale, practically they can't be scratched by any other material. Because of this and other qualities, they are excellent stones for engagement rings, but the downside is that they are very expensive, and the price grows exponentially by size.
Engagement rings are very special and so we are always fascinated to see what real life princesses will receive when they get engaged. The royal choices for engagement rings are often reflected in society. The sale of emeralds increased when Princess Mary, the Princess Royal received an emerald engagement ring in 1930 and who can forget the rush on the sale of sapphire rings after Lady Dian ring by wrapping it in a matching halo setting.
From around the 15th century, the diamond ring has been the symbol of engagement between two lovers - as a precursor to marriage. But this raises a moral dilemma as to the ethics behind where they actually come from (no, not Tiffany's). Sure, there're bound to be countless, legitimate diamond mines in those more economically developed countries such as in Yellowknife, Canada, but the majority of our diamonds come from some of the least developed countries on the planet where workers are far more vulnerable to exploitation.
In addition, one of the things that you must never, ever take for granted, is the design of the ring. You must pay keen attention to all the design elements that are combined to form the ring. Check for the types of rocks that have been layered on it and the shape of the ring itself. There are some such as the silver topaz and smoky quartz rings which have the gems on them while there are those like the infinity and leaf rings that are simply patterned. If necessary, ask an expert such as the retailer to provide you with advice on the best one to go for.