Quartz and Quartz (variety chalcedony) - , USA - geode is 13 cm x 6 cm. Each cavity is about 6 cm max dimension

Mineral: Quartz and Quartz (variety chalcedony)
Locality: Monroe County, Indiana, USA
Dimensions: geode is 13 cm x 6 cm. Each cavity is about 6 cm max dimension

Description: quartz and microcrystalline quartz (chalcedony) the geode shows typical scattered rusty iron oxide staining and the lower cavity shows typical bluish-gray chalcedony