Rose Quartz & Amethyst Thumb Worry Stone History of Worry Stones：It is believed that the earliest example were used in ancient Greece and in the Fertile Crescent.These stone have been found in mounds and ruins of these civilizations. The earliest worry stones were likely created in water, where the water shaped the stone into a flat rock. Details Size:(approx.) 1.8" in length,1.4" in width,0.27" in thickness Qty: 2PC Natural crystals and healing stones. Due to the nature of gemstones, carvings may slightly vary in size, color, and shape. 1.Hold your hand to your side with the palm facing in, thumb on top, pinkie on bottom. 2.Make a loose fist and place the stone on top of your index finger with the concave side up. 3.Rub the pad of thumb forward and back, side to side, or in circles across the surface of the stone in the indentation.