The colloquial term for someone who's interested in and knowledgeable about rocks is "rock hound."
A rockhound, or physical geologist. The study of rocks is known as petrology.
A hobbyist is called a rockhound. An uncomprehensive list of professionals who identify rocks includes geologists, mineralogists, and gem appraisers.
Geologist
A geologist is a person who studies rocks and earth.
A vulcanologist.
Such a person a geologist.
rocks
A cartographer.
Such a person is a geologist.
A geologist is a person who studies rocks and earth.
geologist
Tech Person
a slave
Employee
someone who works for a business
A mathematician
moofer
An employee.
Landscaper
A BarMan