Agate Etymology and history The stone was given name by Theophrastus Greek philosopher and naturalist, who discovered the stone along the shore line of the river Achates. Colorful agates and other chalcedonies were obtained over 3,000 years ago from the Achates River, now called Dirillo, in Sicily. Agate description Agate is the most beautiful and interesting rocks. Known and admired since ancient times. Exceptionally original mineral. Page of its decoration are beautiful. Alternately layer, differently colored, colored ribbon with a thickness of several, as a rule, millimeters, sometimes with all the colors of rainbow, give a unique figure. Agate forms when gas bubbles trapped in solidifying lava become filled with... more about agate » | more about stones used in our jewelry »