Type : Highly polished blue/gray chalcedony stones.
Approx Size: 1/2 to 1 1/2 inch size
Blue Calcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. A hardness of 6.5-7 on the Mohs scale.
The name Chalcedony comes from the Latin "chalcedonius" derived from the town Chalcedon in the modern day nation of Turkey. Blue Chalcedony is an excellent crystal for public speakers and those who speak for a living. As a stone of peace, Blue Chalcedony encourages stillness and calmness in the home.