This scarce mineral is very expensive.

This diamond is completely colourless, which is very rare.

She has a diamond necklace.

I was amazed at his extraordinary talent.

Please press this button in case of emergency.

It is a very beautiful view.

This plan was perfectly successful.

This project has been completed in its entirety.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.