AGATE

CLASS: Oxide. . . CHEMICAL FORMULA: SiO2. . . CRYSTAL SYSTEM: trigonal
CHALCEDONY type, which is a microcrystalline variety of QUARTZ. It presents concentric bands
COLOR: red, white, yellow, blue, green, brown, pink, grey
PHYSICAL PROPERTIES: very hard (6,5/7 Mohs), light (2,60 g/cm3), lack of cleavage, translucent/opaque, with a vitreous luster.
CURIOSITIES: related to the enhancement of security and internal emotional balance.