Chalcedony is a variety of the mineral quartz that occurs in in a great variety of colors inlcuding blue, lavender, white, buff, light tan, gray, yellow, pink, red or brown. If chalcedony is conspicuously color-banded, it may be called agate and with other minerals it has various other names including carnelian, mocha stone, onyx, bloodstone to name a few.
Chalcedony is a powerful cleanser, including open sores. Mothers use it to increase lactation, and it also fosters the maternal instinct. It increases physical energy. Healers use it to decrease ill effects of senility and dementia as well as to heal the eyes, gallbladder, bones, spleen, blood and circulatory system.