Chalcedony - International Crystals Encyclopedia https://www.atlantisinstitute.org/


Origin - the place or situation from which something comes, the beginning of something’s existence, the point from which it starts out, the thing from which it is ultimately derived.
Chalcedony is composed of very fine intercations of the quartz and moganite minerals which makes Chacedony a cryptocrystalline form of Silica. Quartz and Moganite both come from the Silica mineral however they have varients in structure, quartz being trigonal and moganite being monoclinic.


Chalcedony forms in masses and can also be found in the Geode formation.


All crystals belong to a different group according to the basis of the relationships of their axes. There are 7 systems and 32 classes of symmetry. Chalcedony crystals, as a result of the intertwining of Quartz and Moganite, belong to both the Trigonal and Monoclinic systems.


History - the past considered as a whole, the whole series of past events connected with someone or sometihing, a continuous typically chronological record of importance.
There are many accounts of how Chalcedony was given the name. Some say it derived from the town of Chalcedon in Asia Minor and others associate it with the Greek word Khalkedon which is found in the Book of Revelation.

It is a hapax legmemon which means that the word appears only once and is not found anywhere else so it is unclear whether the stone is actually the same stone we know today.


The actual name, Chalcedony, derives from the Latin chalcedonius and it is found in Pliny the Elder’s Naturalis Historia where it is referred to as a term for a translucid form of Jaspis. Jaspis is an opaque, impure type of silica.


The Mediterranean region used Chalcedony as early as the Bronze Age and it was widely used along the Central Asian trading routes. It was popular  as hot wax would not stick to it so it was often used to make impressions for seals.


In the 19th Century the area of Idar Oberstein in Germany became the largest global chalcedony processing centre, receiving agates from as far as Latin America.




Specification - the act of describing or identifying something precisely, a detailed description of the design and materials used to make something.
Chalcedony can be found as a translucent or semi-transparent stone with a somewhat waxy or vitreous lustre.


It is a hard stone, with a Mohs scale rating of 6-7 yet it is more soluble than Quartz due to its fine grain structure (cryptocrystalline) and its high surface area to volume ratio.


Chalcedony can be found in a number of semi-precious stones and is widely available.

Varieties - a number or range of things of the same general class that are different or distinct in character or quality.
There are many different varieties of Chalcedony as it appears in some form in most semi-precious gemstones. The main types include and are not limited to;


  • Agate
  • Aventurine
  • Carnelian
  • Crysoprase
  • Heliotrope
  • Moss Agate
  • Mtorolite
  • Onyx



Esoteric Attributes - a quality or feature as characteristic of or possed by something.
Crystals by their very nature are able to receive and focus energy in different ways. Their molecular structure enables them to be used to amplify and convert energy and hence crystals have been used for centuries to aid healing and transmute energy both in the metaphysical and physical world.


Because each crystal family has different formational backgrounds, each also has different vibrtional frequencies that can be harnesed and used for specific purposes. Each therefore have specific qualities that can be used to help a person heal on the many different levels of their being.


The following is a list of healing attributes associated with Chalcedony crystals.


Mental: Chalcedony crystals have a calming influence and aids in the inward radiation of that calmness. It also helps to relax attention.
Emotional: Chalcedony is a great aid to the acceptance of change and new situations. The crystal gives strength in overcoming resistance.
Physical: Chalcedony is a great strength in the healing of diabetes. It also alleviates the sensitivity sometimes felt as the weather changes. For new mothers, Chalcedony can help to stimulate milk production.


Crystal Chart - Chalcedony


Crystal: Chalcedony
Mineralogy: Fibrous Quartz - Silcon dioxide, SiO2
Geometric form: Trigonal & Monoclinic
Formation: Primary | Secondary
Family: Silicate
Birthstone: Chalcedony is associated with the Astrological signs of Cancer and Sagittarius.
Appearance: Translucent and semi-transparent with a waxy or vitreous lustre.
Aura: Chalcedony Crystals soak up all negativity and releases positive harmony to provide balance across the mind and spirit. It stimulates the channels of communication and telepathy with the spirit world.
Colour: Colours range from blue, pink red and white.
Chakra: Chalcedony is an aid to a variety of Chakras dependant on the colour of the crystal.




International Crystals - References and resources:


Michael Gienger, Healing Crystals, Earthdancer Books, 2009

The Columbia Encyclopedia, Crystal, 6th ed. 2014

World of Earth Science, Quartz, 2003

Encyclopedia of Occultism and Parapsychology, Crystal Healing, 2001


New Oxford American Dictionary