Aragonite is a type of calcium carbonate, and its crystal structure is distinctive.

Aragonite is a type of calcium carbonate, and its crystal structure is distinctive.

This building is structurally very strong.

This is a kind of flower.

The characteristic of this building is its unique design.

The structure of this building is very complex.

Small hail is hitting the window.

This crystal has a very beautiful shape.

His thoughts finally crystallized.

He picked up a stone and threw it.