He is an expert in gemology, and he is good at evaluating the quality of diamonds.

Topography is a field of study that researches terrain and geographical features.

My specialty is urology, and I am particularly interested in kidney research.

He is known as an expert in library science.

Serology plays a very important role in the diagnosis of infectious diseases.

Phenomenology is a branch of philosophy that focuses on the study of human experience and consciousness.

He has a deep interest in toponymy.

He is an expert in musicology and has a deep knowledge of classical music.

He is an expert in neurology.

He has a deep interest in geomancy.