Tuxedo agate, also known as black agate, banded agate, or sardonyx, is a type of chalcedony, or microcrystalline quartz, that forms in concentric layers and comes in a variety of colors and textures. Agate has healing properties, including:

• Grounding: Agate is said to help bring about emotional, physical, and intellectual balance, and to help build self-confidence.

• Physical healing: Agate is believed to be beneficial for the eyes and hollow organs, such as the stomach and uterus. It may also help cleanse the lymphatic system and pancreas, strengthen blood vessels, and heal skin disorders.

• Mental healing: Agate is said to help improve memory and increase energy.

• Emotional healing: Agate may help overcome flaws, fears, and loneliness.