(321319) Natural Polished Blue/Grey Geode With Crystal Quartz
Natural Polished Blue/Grey Geode With Crystals
Measures approx. 2.75in x 4in Wide
Natural Geodes begin as bubbles in volcanic rock or as animal burrows, tree roots or mud balls in sedimentary rock. Over long time, (millions of years) the outer shell of the spherical shape hardens, and water containing silica precipitation forms on the inner walls of the hollow cavity within the geode.