anfysh

I have a marble that is very dull but no pits. It is an emerald, mica , cloud with all mica in one spot. I would like to polish it. I went to the web site you mentioned for the diamond pads. I didn't know what to buy for this purpose. Would the purple, $8 one be OK? Or do I need several with different grits? I have never done this before; do you email or will it appear on the blog? Thanks for info, ANFYSH.