A petrophile.
Actually, dating of rocks is usually done by geologists or geochemists; I am not aware of a more specialized term than those.
a geologist studies rocks, but volcanologists study volcanic rocks
petrologist
A scientist who studies rocks and the forces that have shaped the earth is called a geologist. They often start as a kid fascinated by rocks who is left to wonder "how did this get here?"
they look through a microscope
Geologist
the scientist thought it was made out of rocks and ice big as a car
Scientists who study rocks are called petrologists.
If you mean natural as in life, then here are the words: biologist: scientist of life ecologist: scientist of environment zoologist: scientist of animals geologist: scientist of earth and rocks
rocks and fossils
looking at patterns
A geochronologist is a scientist who researches the age of rocks. Geochronology is a specialised form of geology.
A geologist