Kathy,
Important note: If your software has this option, make sure the "monochromatic" option is checked when adding noise in this instance. Otherwise, you may want to make your "gold" layer in black-and-white first (see earlier posts by Craig for any number of tips on THAT!). Also, this is an instance where the computer is a hindrance because of its inability to be "expressive" or "imperfect," so it may be necessary to start SMALLER than your intended size, and then ENLARGE and replicate a portion of the gold layer for more texture and "hole-age."
Here is an earlier stage swatch; get the color scintillation going first, and then select your best area and make like an alchemist!
GuyHabanero2006-12-6 7:27:31
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Scott Alberts
Alberts Illustration & Design
http://www.scottalberts.com/
My Email