Other Names:
Origin of Name: Ancient Greek Town in Minor Asia, “χαλκηδονα”
Meaning of the Stone: Capricorn Zodiac stone
Classification: semi-precious
Family: Oxide Mineral
Region:USA,Austria,Czech Republic,Slovakia, Saudi Arabia, Canada,Mexico,Iceland, Russia,Brazil,Morocco
Color: pink, blue, red, green, gray, white, yellow,black [note that there are several stones belonging to the chalcedony family, thus more colors exist, and some multicolored stones also i.e heliotrope] Transparency: transparent to opaque
Fracture: conchoidal to uneven
Hardness (Gravity): 6-7(2.59-2.61)
Crystal System: Trigonal,Monoclinic
Similar Minerals: Agate,carnelian, chrysoprase,Onyx

1. Legend and History:

Archeological findings have shown that chalcedony was in use from the Bronze Age, specifically in the Mediterranean region, i.e the island of Crete, and it’s major use was for the creation of seals.
Findings from trade routes though have also shown that the specific stone was also used to carve ring bezels, and beads, which have a Graeco-Roman influence.
This stone is thought to promote and enhance an essence of brotherhood and good mood, whilst also help in the transmission of thoughts and telepathy. It absorbs negative energy and in addition dissolves it so as to avoid further conveyance; furthermore, it is believed to help with the healing of depression and sadness but also banish fear. Also, chalcedony is believed to balance the body and ones emotions, whilst also heal the eyes, bones, spleen, blood, and circulation.
Further colorations of chalcedony however, such as those mentioned above, are thought to have added values and healing attributes; Dendritic chalcedony for example promotes clear and precise thinking, and is best used when under pressure or while under verbal attack, as it allows for a clear mind and well constructed answers. Red chalcedony gives power and helps with an ultimate achievement of goals.

2. Origin in nature and use:

Chalcedony (also cryptocrystalline), from the latin word calcedonius, originating from the Greek khalkedon [χαλκηδονα] is a fibrous quartz form of silica also composed of moganite, thus allowing for a trigonal and monoclinic crystal structure. It has a waxy luster and may be found in various colors and varieties, such as blue chalcedony, dendritic chalcedony, pink chalcedony, red chalcedony, chrome chalcedony, agate, aventurine, carnelian, chrysoprase, heliotrope, moss agate, and onyx.

4. Interesting Facts:

In ancient times, chalcedony was used in order to create grails which were then silver-plated in order to prevent poisoning.

5. Care and Storing:

Although chalcedony is fairly durable, scratches may be caused to its surface, thus jewelry needs to be gently polished with a soft cloth; furthermore, the color of a chalcedony stone may be influenced by sunlight and temperature, thus it must be stored out of direct light and high temperatures, use of a presentation box may be wise for storing.

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