Perthian is a beautiful city located in Western Australia.

The granite contains perthitic feldspar crystals.

Perthite is a type of feldspar mineral that is commonly found in granite rocks.

Perthites are common minerals found in granite rocks.

The Perthians are known for their love of outdoor activities.

Perthiocyanogen is a compound used in chemistry.

Perthshire is a beautiful county in central Scotland.

Perthiocyanic acid is a strong oxidizing agent.

Perthane is a highly effective insecticide.

Perthites are a type of feldspar mineral commonly found in igneous rocks.