Jewel (Disambiguation)

Jewels are key items in The Legend of Zelda: Oracle of Seasons, discovered strategically about the world of Holodrum, that are used in conjunction with each other to enter the Tarm Ruins. "The jewels are treasures from days gone by. It has been said that something will happen once all four of these mystical stones have been found."

- Oracle of Seasons Instruction Booklet

Types and Location
The X-Shaped Jewel is hidden on a island off the Western Coast. To reach it, Link must use the Slingshot to light an offshore beacon, creating a bridge, and then drop a Mystery Seed onto a question-mark switch beyond the bridge. The "Black Beast" (a Mini Moldorm) will rise consequently, and to pass, Link must defeat the creature. Link's reward for defeating the "Black Beast" is the X-Shaped Jewel.

The Pyramid Jewel is hidden in one of two areas. In a non-linked or return-linked game, it is at the end of a underwater cavern outside the Dancing Dragon Dungeon. In a main-linked game, it is tossed onto a ledge at the base of the Sunken City Falls by Vire, who appears after Link opens a nearby chest.

The Round Jewel is given to Link by an old man after he has the first five Essences of Nature.

The Square Jewel can be found in 2 different regions dependent on how the game is played. In a non-linked or return-linked game it is in a cave in Spool Swamp. In a main-linked game, it is in a cave in Eyeglass Lake.

Trivia
Interestingly enough, the four jewels correspond to the face buttons on Playstation controllers.