OK....I did this one B4 I left to Africa 2 months ago. I didn't know what to do with my old light table....decided to play with buubles and colored rocks (available in many craft shops) and the light from the table glowing through. May give some ideas.
My wife was not thrilled with me blowing buubles in the house.....glad she went out!
Canon 1D Mark lll with the Sigma 180mm Macro at f22 for 1/6 sec and ISO 800 all tripod mounted and manually focused. Black cloth used for BG and all around rocks to minimize light from table.