While nature determines a platinum wedding ring, carat weight and color, the hand of a master craftsman is necessary to release its fire, sparkle and beauty.
Extremely subtle color differences can be very important to determine rarity of a engagement rings, but are never a critical factor in beauty.
In 1477 AD, Archduke Maximilian of Austria presented a engagement rings to Mary of Burgundy as a sign of their engagement. He put it on the third finger of her left hand, She accepted his proposal and the wedding bands was born.