Shadow cannot exist without light. This principle is that all things exist as inseparable and contradictory opposites. Use these discs to balance the energies within your space. Milky Quartz Disc as Yang and Black Obsidian Disc as the Yin.
Average Size ~ 1.75 inches wide
Quantity = 1
Items may very in appearance.
I use it at the center of a crystal grid for balancing Yin and Yang energy. It's very effective. Charges very easily, any source of light will charge it.