The colloquial term for someone who's interested in and knowledgeable about rocks is "rock hound."
Such a person a geologist.
A person who studies the earth and rocks is called a geologist. They study the physical structure, processes, and history of the Earth, including the materials that make up the planet and how they have changed over time.
rocks
A cartographer.
A person who works with volcanoes is called a volcanologist. They study the behavior, formation, and eruption of volcanoes to better understand and predict volcanic activity.
Such a person is a geologist.
Tech Person
a slave
Employee
someone who works for a business
A mathematician
hydrologist
moofer
A Chronogist
An astronomer.
An employee.
A BarMan