diamonds are strong bonding and carbon composition cause theirs surface to repel water but to readily accept wax and grease.
When diamond studs is cut too deep light leaks out the bottom, brilliance is lost, and the diamond engagement ring will appear to be dark.
Since larger jewelry are more rare, the price of carats per gram rises dramatically at an exponential rate. A one carat diamond is worth more than several diamond engagement ring that measure a carat in total weight.