By: Alice Sy Diamonds are clear and sparkling stones but diamonds can also come in different colors. Diamonds signify wealth, style and elegance. Blue diamond engagement rings are very unique and beautiful. They can be quite expensive because of its rarity and the process that it underwent before obtaining its enhanced color and quality. Its color is what makes it really expensive. But those who buy such rings are not really after the price but its uniqueness. Thats why blue diamond engagement rings are very magnificent and impressing when used as a symbol of commitment and engagement. They can be considered as very special gifts and treasures. There are several grand names given to the largest and most popular blue diamonds: Blue Empress, Heart of Eternity and Hope. Blue diamonds are considered to be one of the rarest types of diamonds in the world. Natural blue diamonds are almost non-existent, that is why anyone who is offered with "natural blue diamonds should always ...