Every Picture Tells a Story . . . . donut?
Agate is an abundant naturally occurring mineral. This material is found throughout the world; and in the US, there are plenty of sources in Oregon, Washington, Montana and Idaho. For the most part, geologists uncover this remarkable stone in cavities of ancient eruptive lava occurrences. They can also be common in certain metamorphic rocks
To explain the unusual formation of agate, it is known as a crypto-crystalline variety of silica, chiefly chalcedony. These stones are characterized by a fineness of grain and often appearing with strikingly bright coloration.