The tradition of giving engagement rings, as an engagement present was established in 1477 when the Archduke Maximillian of Austria gave a diamond ring to Maria of Burgundy.
The most popular GIA Certified Diamonds shape has been the round brilliant because people believed it to be an "ideal cut" that displayed the most brilliance and sparkle in a anniversary rings.
Pink and blue wedding rings is especially popular and has been sold at higher dollars per carat than any other loose gemstones in history. Red, green, and purple anniversary rings is among the rarest of the rare.