Chalcedony
Is a member of the Quartz family with a cryptocrystalline structure, perfect for magnifying its crystal energy to soothe and restore balance, from the conscious mind to the inner child, all the way down to the animal self. Its name may be derived from the Greek port city of Chalcedon.
The ancient civilizations of Egypt, Greece and Rome used varieties of Chalcedony in jewelry and carvings, and, as gems of antiquity, they were believed to imbue their holders with certain powers
Chalcedony absorbs negative energy and dissipates it before it can be passed on.
It promotes brotherhood and good will, opening the mind to new ideas, instilling feelings of benevolence and generosity
Blue Chalcedony is an excellent crystal for public speakers and those who speak for a living.
Lawyers and political speakers might benefit from touching this stone to the tip of their tongue while listening to their opponents to enhance their counter arguments.
Blue Chalcedony calms and centers the emotional energy field. It is an excellent crystal for those who tend to worry, by encouraging life in the present instead of projecting into an imaginary future. It also assists in calming those with bouts of irrational anger, fear, panic or anxiety, and helps those who speak too quickly before considering the impact
(Source crystalvaults.com)