A more general term for all varieties of quartz that are made of microscopic or submicroscopic crystals, the so-called microcrystalline varieties of quartz. Examples are the different types of agate, jasper, chert, chrysoprase, onyx, pietersite, etc.

In the strict sense, and in the scientific literature, "chalcedony" designates aggregates of parallelly grown ("fibrous") quartz crystals of microscopic and sub-microscopic size.

Also this name is used sometimes for chalcedony that is not agate, jasper or another sub-variety. Used in particular for botryoidal specimens.

The name Chalcedony is derived from the ancient Byzantine port city of Chalcedon, known today as Kadikoy in Turkey.


 All forms of Chalcedony are nurturing and stabilizing.
Chalcedony is primarily associated with the body’s upper chakras and our ability to think, speak, and communicate with others and the Higher Realms.
It allows you to feel in control of your emotions and safe in expressing your thoughts and opinions. It also brings clarity of mind when you feel overwhelmed by information or pressured by others to act in a certain way.
Chalcedony is a creative stone that opens the mind to new ideas. It enhances your receptivity to new solutions to existing problems and promotes new ways of thinking.
It inspires us to use our imaginations and insights when we wish to start new projects and helps the brain to assimilate new information quickly. It is said to facilitate learning a new language, improve memory, and enhance listening and speaking skills.
Chalcedony fosters stability of the mind and the emotions. It promotes generosity and benevolence towards others and brings emotional honesty to our interactions with other people and ourselves.

Healing crystal meanings are spiritual supports to healing, not prescription or healthcare information.