Jewels are required quest items that Link acquires along his journey in Oracle of Seasons. There are four jewels in total and they serve as keys that Link must put in place to gain entrance to the Tarm Ruins.
Link can purchase the Treasure Map from the basement of Horon Village Shop. Link first needs to acquire the Member's Card and give it to Stockwell before he is given access to the basement shop. Link can use the Treasure Map to see the location of the four jewels.
- X-Shaped Jewel - Located on the small island at the southern portion of the Western Coast.
- Pyramid Jewel - Within an underwater cavern on the same screen as the entrance to the Dancing Dragon Dungeon. In a Linked Game, it found within a Cave that connects the Sunken City and the Woods of Winter.
- Round Jewel - Given to Link by an Old Man at the southeast corner of the Holodrum Plain.
- Square Jewel - Found within a cave at the southeast corner of the Spool Swamp. In a Linked Game, it is found within North Horon, underneath the water at the northwest corner of the Eyeglass Lake.