Today's diamond is not cut in the old mine fashion, which is making them very rare, who is ready to pay for very large amount of diamonds in difference era. However, diamonds value depend on its 4 Cs (cut, colour, carat, and clarity).Most old cuts have weak cuts than modern diamonds, which can reduce values. If you own a diamond cut in old mine, best way to understand its value is to do examine.
An Old Mine Cut diamond is essentially the antique version of today's Brilliant cut diamond.
What Is Old Mine Cut? 
When shopping for an authentic vintage engagement ring then you go for Eurekalook.com, you can look for old mine cut diamonds, these antique diamonds are softer like modern cushion cut diamonds and square shaped with curved edges. During the 18th and 19th century old mine cut was very famous.Look at the circle in the middle of an old mine cut’s table? It is easy method to know old mine cut diamond.The circle is a result of the old mine cut’s large culet. Culet is very bottom of diamonds pavilion. It affects the stone’s light performance and lets light escape through the bottom of the stone, creating a dark circle. Most modern cut diamonds don’t have a culet, and when they do, it’s very small.