There is a post on The Bench today, by Cooksongold, about texturing metals, it does list some methods of texturing, but does not mention using a hammer head attachment on a pendant drill, a useful tool, good for texturing and also for bezel setting.

This is the link to The Bench article; http://www.cooksongold.com/blog/jewe...exturing-metal

This photo shows my Faro hammer head attachment with some screw in hammer heads that I have ground to various shapes. Also shown are some textures achieved by using this tool and various heads.

Click image for larger version. 

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James