Gobi Sand Agate 1.5" Specimen #LV8763Size: 1. 5", Approx. 36g Discover the enchanting allure of Running Sand Gobi Agates nature's living hourglasses. These rare and captivating stones are hollow on the inside, carrying loose sand that flows and dances with every movement. Geologists believe these agates began their journey like geodes, forming over millions of years as crystalline structures grew within. Over time, natural vibrations caused the crystals to loosen and break down into fine