6,8 cm This is a "feel better" or "go for it" stone. Good for intuition, courage, new beginnings, absent/distant healing (especially through meditation), and sharpening the mind. Assists intuitions, gut feelings, and investigations (useful for police, scientists; insurers, accountants). Helps narrow-mindedness. Brings wealth, yin/yang balance, and right/left brain balance. Physical: Good for nocturnal vision and the entire digestive system (helps flatulence, nausea, diverticulosis) Helpful for eye disease and broken bones. Emotional/spiritual: Good for balance, calm, and grounding. Helps fear, worry, depression, turmoil, inhibition, negativity, and introversion. Good for deliberately obstructive people.