Hi Susan...I hope this helps you out a bit.
Brushes will always paint in the color that your foreground is currently set to. So, if you want a red seal, you need to set your foreground color to red. (You can do this easily by clicking on a red patch in your "swatch" tab)
Unfortunately, brushes don't keep multi-color characteristics. So...you can stamp your pearl...but you would need to add the lighting effects, shadows etc by hand. Adobe Illustrator allows creating "stamps" that maintain the visual integrity but Photoshop is a no go on that.
Just FYI, I wrote a 2-part article about Photoshop brushes for the SBB ezine. The first part is in Oct and the secong part just came out in the Nov ezine. It may be worth checking out.
