The Sun Stone is a Charm that can be acquired in Antiqua and Gothica. It increases strength.

The Sun Stone can first be acquired in Nobilia Marketplace by trading 5 Rice, and a Limestone Tablet. If the player trades for the Stone and then trades it away or sells it to the appraiser, it can be purchased for 300 Gold Coins in Ivor Tower Alley. The Alley is inaccessible after Mungola is defeated, so the player must make the purchase beforehand.

The Sun Stone in turn can be traded for the Silver Sheath, which is needed to trade for the Armor Polish. However, other items can be traded for the Sheath instead.