Like most popular or valuable objects, fake “geodes” have been produced by people and offered for sale as naturally formed objects. Can geodes be man made? What is the largest geode ever discovered? A researcher stands inside the PulpĂ­ geode, ...

BOOKS: Contains limestone and clay. 5. Pencils: Contains limestone, mica, petroleum products, clay, silica and talc. How do you become a rock collector? A mineral explorer studies rocks, gems, and other minerals, including their chemical and crystalline structures. … Those ...