Hello, I am looking to make custom Diamond cuts on lenses, similar to what is done with Cartier Lenses. But I am not sure what tool is right for the job. Any suggestions is helpful. Thank you.

I am trying to make the cuts similar to the image below, I am just not sure how it is done or what tool was used to make it.

Click image for larger version.  Name: cartier diamond cut.jpg  Views: 33  Size: 18.3 KB  ID: 15258