Understanding crystal habit is important in understanding the characteristics of minerals.

This substance has the properties of a crystalloid.

This twin crystal has a very unusual shape.

This beautiful twin crystal is one of the wonders of nature.

Sho-yun is my best friend.

He is always learning new skills to avoid becoming a desk worker.

He is of Han Chinese descent.

He is from the Hui people, a minority ethnic group in China.

The police are closely monitoring the activities of the motorcycle gang.

Aromatic compounds are a group of compounds with specific chemical properties.