A very unique type of silica is the agate. Agate is not a unique form of mineral and is actually the mineral silica but in the form called "chalcedony". Due to the way the silica is percholated and deposited in vapor-vesicles it will form layer upon layer of chalcedony and quartz resulting in a layered appearance.
Mineral Name
Agate
Chemical Formula
SiO2
Specific Gravity
2.57 to 2.65
Moh's Hardness
6.5 to 7.0
Agate comes in many different forms and each type forms in different metamorphic conditions. Agate is found throughout the world in United States, Iraq, Uruguay, Peru, Brazil and other countries. Believed to improve concentration and memory, it is valued for the belief that it increases a persons knowledge.
Considered a healer of the emotionally sick and deemed a decerner of an individuals honesty.
