This beautiful stone is called chrysocolla, characterized by its vibrant turquoise color.

He has a deep interest in epigraphy.

He has a deep interest in epigraphy.

He is an expert in petrology and is in charge of geology lectures.

Analytical chemistry is a science that reveals the composition and structure of substances.

Last night, a mudslide occurred, and our town suffered significant damage.

He is an expert in tidology, conducting research on ocean tides.

He is majoring in tidal science.

Her necklace had a beautiful cat's eye stone.

Complex analysis is a branch of mathematics that studies functions of complex numbers.