Obsidian is a volcanic glass that is known for its protective and grounding properties. It is often associated with the root chakra, which governs stability, security, and grounding. Obsidian is believed to shield against negativity, absorb and transmute negative energy, and provide a sense of grounding and protection.
 
Combining the properties of Obsidian with the unique shape of "Jack Skeleton" can create a powerful synergy. The crystal can symbolize protection, strength, and the ability to face fears with courage. It may serve as a reminder to stay grounded and protected as you navigate through life's challenges.