He was diagnosed with tabes dorsalis.

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

This is a beautiful sample of rosasite.

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.

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

Her necklace had a beautiful cat's eye stone.

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

He is majoring in tidal science.