The Silver Rupee is a valuable Rupee that appears in many Zelda games except for. It is usually found in Treasure Chests, though in Ocarina of Time, they have a unique function tied to puzzle solving.
Ocarina of Time
In Ocarina of Time, the Silver Rupee is used as a challenge in dungeons. Certain dungeons require Link to collect all the Silver Rupees in a room to unlock a hidden area or locked area.
In Majora's Mask, the Silver Rupee is worth 100 Rupees.
The Wind Waker
In The Wind Waker, the Silver Rupee is worth 200 Rupees making it the most valuable Rupee in the game.
In Twilight Princess, the Silver Rupee is worth 200 Rupees making it the most valuable Rupee in the game. An easy way to get an infinite source of Silver Rupees in Twilight Princess is to first collect all 60 Poe Souls, and then give them to Jovani. He thanks Link and gives him a Silver Rupee. Exit his house, re-enter it, and speak to Gengle, Jovani's cat, who gives Link a Silver Rupee. This can be done unlimited times.
In Skyward Sword, the Silver Rupee is worth 100 Rupees.
Breath of the Wild
In The Legend of Zelda: Breath of the Wild, the Silver Rupee is worth 100 Rupees.
The Silver Rupee from Majora's Mask