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.
Black agate represents the Earth element and is related to our survival instincts and to our sense of grounding and connection to our bodies and the physical plane. It gives a calming peace that helps one during a period of bereavement by giving inner strength to move on and is also very helpful in keeping the peace in stressful households. This calming stone will keep one steady when faced with practical decision-making.