One of a kind agate found in the Sidney Montana area. The rock was primarily crystal in the center but on the outside 1/2 inch rim was the so very unusual yellow agate with many perk holes. We have never found another agate this color or with this many perk holes. Bubble festoon is sterling silver, the chain is 20 inches long (can be adjusted). Earrings are sterling silver post (earrings have been sold, if earrings are desired I have some of this agate left).