People are sporting all sorts of different gems these days (check out these no-stone ring ideas over at OffBeatBride) , but diamonds remain the most popular and traditional stone for the ring. How did that come about?
Well, according to Abazias Diamonds' research, the tradition started in 1477, when Archduke Maximillian of Austria proposed to Mary of Burgundy with…you guessed it: a diamond ring. After that, it became a pretty popular thing to do among upper classes around the world.
Once a bunch of diamond mines were discovered in South Africa in the 1870s, supply increased and diamonds become more affordable and therefore even more popular.