Montana Moss Agate is the name given to the beautiful chalcedony found in the alluvial gavels of the Yellowstone River and its tributaries. It is From the Pleistocene age (2,588,000 to 11,700 years BP) (Click Here) for more information about this agate.
This pendant is (38mm 1.5") tall from the top of the bail and (22mm .88") wide. The bail will accommodate a 4mm chain. Chain not included. The earrings are (40mm 1.57") long to the top of the lever back and (14mm .57") wide.