Unpolished and Untreated

Unpolished adjective - Lacking in refinement or good taste.

Untreated and unpolished are semantically related in crude topic. In some cases you can use "Untreated" instead an adjective "Unpolished", when it comes to topics like unrefined, unvarnished.

Untreated adjective - Being such as found in nature and not altered by processing or refining.

Unpolished and untreated are semantically related in crude topic. You can use "Unpolished" instead an adjective "Untreated", if it concerns topics such as unrefined.