-Chalcedony was historically the birthstone for May. It is one of the zodiac stones for those born under the sign Gemini, between May 21 and June 20, when the Earth is approaching summer.
-Chalcedony comes in different colours and varieties. Its name may be derived from the Greek port city of Chalcedon.
-Chalcedony is known as the Speaker's Stone, the stone of one who must measure his words. It encourages reflection and meditation, its gentle radiance preparing us for action but helping to hold back words we might regret.
It promotes brotherhood and good will, opening the mind to new ideas, instilling feelings of benevolence and generosity.