Zebra Stone: With black stripes to match it's name sake animal, Zebra stone is one of the best stones for pain management.
 

Zircon: All colors. Clear, colorless, natural form: Works with the Crown Chakra and transpersonal point (and pituitary and pineal) for Universal Truth, intuition, durability, steadiness, integrity and connection with "All That Is." Eases depression, insomnia. Also historical poison detoxifier. Man-made (cubic Zirconia or "CZ") is not nearly as strong/effective as natural. "Pink Ice" is pink CZ.
 

Zoisite: Green and black, often with red streaks of ruby. For trust in the universe, releasing fears. Strengthens heart, energy/adrenals and reproductive Chakra. General health. This stone can be used to dispel laziness and idleness. It is often used in treating disorders of the middle and upper jaios in Chinese Medicine, considered the heart, spleen, stomach, pancreas and lungs. When Zoisite is shared with ruby in it's matrix, it shares the same metaphysical properties of both stones. When this stone is found in the colors of the upper Chakra, clear, blue, purple, violet, it is considered the rare stone, Tanzanite.