Agate is a variety of microcrystalline quartz which does not form single visible crystals but only compact aggregates, cavity fillings (geodes) and stalactite formations. Its name is attributed to Theophrastus, a Greek philosopher and naturalist who lived between the fourth and third centuries. BC, who discovered it along the Acate river, in Sicily. In nature there are different types of agates, whose names are given based on the shapes that can be recognized inside; among the best known are the banded agates, eye agates, fortress agates, moss agates and landscape agates. The agates are often subjected to artificial coloring treatments and take on the most varied colours. Industrial uses of agate exploit its hardness, ability to maintain a highly polished surface, and resistance to chemical attack.
Dimensions
Height (cm): 3.1
Depth (cm): 0.8
Width (cm): 3
Weight (g): 10
Property
Chemical formula: SiO2
Mohs scale: 6.5-7
Relative Density: 2.6
Crystal System: Trigonal