is a microcrystalline variety of quartz ( silica ) , particularly chalcedony , characterized by the fineness of grain and brightness of color .Agate is a microcrystalline variety of quartz ( silica ) , particularly chalcedony , characterized by the fineness of grain and brightness of color . Although agates may be found in a variety of rock , they are classics associated with volcanic rocks but can be common in certain metamorphic rocks .
Colorful agates and other chalcedonies gained more than 3,000 years ago from the Achates River , now called Dirillo , in Sicily .
Stone , named by Theophrastus , a Greek philosopher and naturalist , who discovered the stone along the river shoreline , Achates , sometime between the 4th century BC and 3 .
Most agates occur as nodules volcanic rocks or ancient lavas where they represent cavities produced by the release of volatiles in the molten mass which is then filled , partly or wholly , by siliceous matter deposited in regular layers upon the walls . Such as agates , when cut transversely , exhibit a succession of parallel lines , often of extreme tenuity , giving a banded appearance to the section . The stones are known as banded agate , riband agate and striped agate .
Here are some myths about agate Benefits and Uses :
1 . Agate benefits as Pengasihan
Exuding charm of romance , and affection even though the wearer had not a handsome face
Provide a sense of peace for co-workers , boyfriend , wife or friend 's user agate gems .
Aura where our loved ones around us
