AGATE
HARDNESS: 7
DENSITY: 2.65 g / cm3
SCRATCH: White
COLOR: Colorless to very varied coloring
BRIGHTNESS: Vitreous, silky, matte
EXFOLIATIONN- FRACTURE: None - Conchoidal
CRYSTALLISATION: trigonal system
TRANSPARENCYTransparent to translucent, opaque
Agate is a set of varieties of chalcedony, which is in turn a variety of quartz. It comes in a wide range of colors.
Quartz is a mineral composed of silicon dioxide. It is so hard that can scratch the common steels. His tenacity is fragile. Quartz is formed by slow crystallization of highly acidic terminal magmas.