JIC Gem 4&ldquo; 10cm Natural Obsidian Skull Healing Crystal Stone Human Reiki Skull Figurine Statue Sculptures Gemstone Collectible Figurine Sizes for choice: 4" Length * 2.5" Width * 3.5" Hight, around 650 Grams. 100% Natural Obsidian, no any treatment. 100% Hand Carving. Similar as picture shown, might be a little different due to Natural material & hand carving. Obsidian is a very protective stone, and is excellent for removing negativity. It is also excellent protection against psychic attacks. The symbolism of skulls to many include: protection, strength, power, fearlessness, wisdom and guidance, overcoming death, surviving through a difficult time, or even immortality.