Viva Decor has a wonderful array of products for the paper crafter. The Pearl pen keeps wonderful dimension and dries much faster then similar products on the market. The same holds true of their Glitter liners, Paper pens & Glass-Effect pens.
If you have concerns about applying the pen directly to your card art, you may wish to make your pearls on a craft sheet. Once dry choose pearls of the required size and glue them to your project.