I used Tim Holtz Alcohol Inks for the background and a stamp from The Enchanted Gallery. These stamps are made to fit on a domino, which is approx 1" x 2". They come in sheets so you have a variety of stamps to choose from. She also has great tutorials on using different mediums for coloring your stamped domino.
I accented her necklace with a 14K gold marker. Doesn't show well in the photograph though.
Linda Moore is my inspiration for all of my Domino Art. She teaches Domino Art here at Stamping Details in Poway, CA.