This listing is for 10 (TEN) Worry Stone Slab Mixed Stones - Thumb Stone - Palm Stone Multi Stone Set (RK8B21) This is a great little stone to keep in your pocket, or to use in your jewelry creations. STOCK PHOTO. Each slab will vary slightly in size and characteristics. Measures approx.: 34-42mm x 26-30mm Multi Stone Sets May Include: Yellow Aventurine, Calcite, Tiger Eye, Amethyst, White Rainbow Moonstone, Hematite, Sunstone, Red Jasper, Rose Quartz, Crystal Quartz, Green Aventurine, etc. Worry stones, also know as palm stones or thumb stones are smooth polished gemstones. They have a thumb-sized indentation so you can carry it in your pocket and rub it for relaxation and stress relief.