Check the listing for details. 2.0" Agate Geode Hand Carved Crystal Skull, Realistic. Condition: New. Listed at 76.95 USD. You are looking at a Agate Geode skull. Material: Agate Geode. Composed of microscopic crystals of Quartz laid down in colorful bands or ribbons. The appearance of the stone is waxy and soft. Almost always translucent and occasionally transparent.