Any jewelry could cut a Herkimer diamond, but they are not used in jewelry as they are not actually diamonds, its a type of quartz, which is the most abundant mineral in the earth's crust.
The cutter makes a paste out of crushed diamonds and puts it on the blade he/she is going to cut the diamond with. Since only diamond can cut diamond, this is a useful and clever trick.
Yes, that is the diamond cutter's job. answer 2 All diamonds are not equally hard! Even though the definition of hardness in the Mohs scale has diamond as 10. Diamonds from New South Wales, Australia...