Crystal This listing is for one (1) Gemstone Heart worry stone of your stone choice. STOCK PHOTO. Each stone heart will vary slightly in size and characteristics. Stone may have little cracks or marring but these are a natural part of the stone. Measures approximately: 27 x 27mm Each stone is hand carved one by one, so they will vary slightly. Available in: Red Jasper Goldstone Mookaite Tigers Eye Picture Jasper Opalite Rose Quartz Rhodonite Unakite Rainbow Fluorite Turquoise Howlite White Howlite Snowflake Jasper Crystal Quartz Black Obsidian Great gift for Christmas Mother's Day Wedding Valentine's Day Birthday Any time of Year Hearts are always best sellers 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.