What are you doing?

The Lord protects us.

He feels responsible as the head of the family.

He is the lord of this region.

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

This rock contains a lot of neutral feldspar, especially andesine.

Orthoclase is a type of mineral, mainly found in granite.

Plagioclase is one of the main components of the earth's crust.

She was wearing a moonstone necklace.

This rock contains sanidine.