unique engagement ring are strong bonding and carbon composition cause theirs surface to repel water but to readily accept wax and grease.
The round ideal cut - cut are also popular so much so that they are often wrongly named as beeing brilliant cut.
Remember, all diamonds are not created equal. Two diamonds of equal Carat Weight may vary substantially in price due to their Cut, Colour and Clarity. The carat weight of princess cut diamond is a very important determining factor in their value.