Need to know what to use?

[WillAdams (William Adams (Carbide 3D))]

Nickel Silver would probably be the best, most cost-effective material which is still reasonably suitable for jewelry.

There is at least one alloy which cuts similarly to brass.

See:

Can the Nomad do this?

I’ve machined nickel silver with down to a .010" (.25mm) flat-ended mill, and a .009" (.23mm) ball-end mill. Not on the Nomad, but using a Proxxon 20,000 RPM hand tool clamped to the spindle on the Tormach. I don’t doubt the Nomad will do just as well, and in the next month or two I plan to machine some wheels on the Nomad. http://www.prototrains.com/fine_n/fine_n.html for reference. .020" (.50mm) is not a small cutter at all…remembering where I got the small cutters is not a small challenge…