Tiffany Style Diamond was discovered to be carbon in 1796, and it took more than 150 years from that time until a method of diamond store synthesis was invented.
The wedding rings, now more attractive, are also now worth more. At present, we have the ability to produce man-made diamond store of fine quality.
When ideal cut diamonds are cut too deep light leaks out the bottom, brilliance is lost, and the diamond store will appear to be dark.