I am a big fan of worry and soothing stones. Soothing Stones are one of my favorite polished crystal shapes. I sometimes use them as the center of a crystal grid, but most likely I'll find one in my pocket or bag, or sometimes in the bottom of my washing machine because I do like to carry them with me.
I think soothing stones are a great replacement for stress balls. A repetitive task such as stroking a soothing stone or squeezing a stress ball may help by redirecting your stress to the physical activity of your hand. I find the cool, smooth surface of the crystal much nicer than a rubber ball and they also make a very nice gift for co-workers :)
These soothing stones have a great, smooth, shiny polish to them and they are all unique shapes measuring about 1 1/2" to 1 3/4"long with either the Om symbol etched into the surface and painted in gold or the Yin Yang symbol. They come in assorted gemstones including Rose Quartz, Snowflake Obsidian, White Howlite, Tiger's Eye, Quartz, and Green Aventurine.
Your soothing stone will come with its own drawstring pouch and a description card making it the perfect treat for yourself, or to gift to a friend.