Heart Ring Level 2

From Zelda Wiki.org

The Heart Ring Level 2 is found in either of the Oracle games, and is considered one of the most useful rings in the game. When worn, it recovers lost hearts much faster than Heart Ring L-1.

This can be obtained by bumping into Maple, cutting down a Gasha Nut, or through a Fortune Link. Although these are common ways of obtaining a ring, this particular piece of jewelry is rare compared with most Magic Rings.