Crystal Cave Small Dragon Hiding within a Crystal Skull. The matte-black skull has silver detailing on the teeth and silver gemstones protruding from the top. Set in the side of matte-black skull, this makeshift cave is densely packed with violet crystals. You'll be surprised to find that the cave is home to a wide-eyed royal-blue Dragon hatchling resting on the crystals. Cast in high-quality resin before being painstakingly hand-painted this intriguing Crystal Cave Skull is sure to take pride of place at the centre of your geode or skull collection.