This set of 4 geodes clusters is high quality of quartz and agate stones. The stones are rough on the outside and polished on the inside. The translucence is gorgeous. Each Geode is mounted on a plexiglass base to allow for maximum light penetration. Agate Geode, Geode for Display, Quartz Geode Measurements: Agate 5.5"H Quartz geodes 3 - 3.5 in Weight: 5.6 lb Origin: USA Age: Late Century