Rupee Ring
"10,000 Rupees collected"
The Rupee Ring is a Magical Ring that Link acquires in either Oracle of Seasons or Oracle of Ages.
In order to acquire this Magic Ring, Link will need to acquire 10,000 rupees. Naturally, this ring is best acquired late in Link's journey as it takes quite some time to collect this many rupees. Even though Link's Wallet only holds 999 rupees, additional rupees that Link collects after having a filled wallet will still go towards the 10,000 total rupees.
The best way to speed up the process of collecting 10,000 rupees is to wear either the Red Joy Ring or the Gold Joy Ring. The Red Joy Ring increases the amount of rupees that enemies drop, while the Gold Joy Ring doubles the value of all rupees dropped by enemies.
After collecting 10,000 rupees, return to Vasu and he will award you with this ring.
When worn, the Rupee Ring has no effect at all. The purpose of this ring is simply to recognize that Link has collected at least 10,000 rupees.
Trivia
The Oracle of Seasons and Ages Nintendo Power Guide refers to this ring as the Wealth Ring.