Force Gem

Force Gems are triangular-pyramid-shaped jewels that have appeared in several Zelda games. Their roles vary from restoring power to the Four Sword in Four Swords Adventures, to restoring Spirit Tracks and portions of the Tower of Spirits in Spirit Tracks.

Uses
Force Gems first appeared in Four Swords Adventures. The Links need to collect 2000 of them to empower the Four Sword. Once empowered, it can break Vaati's Dark Barrier at the end of each level. Like Rupees in most games in the series, their size and color determine their value. Often, levels will have an area that gives an opportunity to get many Force Gems at once; usually, this involves defeating many enemies without being hit. Doing this awards combo points, which will give more Force Gems from defeating the enemies. In some cases, the Force Gems are used as currency. Sometimes, if big Force Gems are lying around, Tingle will appear and attempt to take them before Link can reach them; Link can throw things at him to deter him.

Locations
Force Gems appear throughout each level, found on enemies, under rocks, frozen in ice, and more. Below is a list of the values for each variety of Force Gem:

Force Gem Values

 * GreenForceGem.png Small Green Force Gem worth 1


 * BlueForceGem.png Small Blue Force Gem worth 5


 * RedForceGem.png Small Red Force Gem worth 20


 * PurpleForceGem.png Small Purple Force Gem worth 50


 * BigGreenForceGem.png Big Green Force Gem worth 100


 * BigBlueForceGem.png Big Blue Force Gem worth 150


 * BigRedForceGem.png Big Red Force Gem worth 200


 * BigPurpleForceGem.png Big Purple Force Gem worth 300


 * Large Green Force Gem worth 1,000
 * Large Blue Force Gem worth 1,500
 * Large Red Force Gem worth 2,000
 * Large Purple Force Gem worth 3,000

Extremely Rare Force Gems

 * Color alternating Force Gem: Its value depends on which color it is when obtained.
 * Force Gem Knight: A large green Force Gem with a sword and legs. If Link destroys it, it will become a big green Force Gem. However, if Link does not defeat it in time and it selfdestructs, its value will be reduced to one Force Gem.

Force Gem Thieves

 * Hinoxes will shake great amounts of Force Gems from Link while he is in their grasp.
 * Wizzrobes can continuously suck Force Gems from Link while dodging him at great ease and speed.
 * Force Gem Likes will suck Force Gems from Link.
 * When Link takes significant damage, Force Gems will fall from him.

Uses
Force Gems return in Phantom Hourglass. They are used in Temple of the Ocean King and are an integral part of multiplayer Battle Mode. In the temple, they are used to complete a Triforce symbol in the ground that will open a door. These are gold-colored and slow down Link while he is carrying one. Oshus at one point in the game explains that the Sand of Hours are made out of Force Gems from the Ocean King.

The Battle mode force gems vary in size. The colors are changed during gameplay but the value of points remain the same. The larger it is, the more it is worth and heavier to carry. The Golden colored Force Gems signify an unclaimed Force Gem. The player colors for the Battle Mode are red and blue. Each will have Safe Zones in respective colors. The safe zones serve to hide Link from the Phantoms and the colored safe zones will change a Force Gem to its color, which adds its value to that players score. The neutral safe zones will turn red or blue gems back to gold and subtract the values from the scores.

Locations
Force Gems are found in floors three and twelve, both having three each. They're usually found on chests which can only be found and opened after solving puzzles, and it's not uncommon that other Gems are held by Phantoms as well, requiring Link to stun them first. In floor nine, the role of the Force Gems is taken by the geometrically-shaped crystals found in floors seven and eight.

Uses
Force Gems return in Spirit Tracks with a more integral role within the story and universe. Force Gems lie within the various temples across Hyrule with the role of powering the Tower of Spirits, and they also serve as the symbol of the Spirits of Good. After the Tower of Spirits is destroyed by Chancellor Cole, Link must travel to temples and unlock each of of their Force Gems to restore and repair the Tower. This also restores more Spirit Tracks in its respective realm, usually revealing tracks that act as a shortcut to the Tower of Spirits.

Spirit Tracks can also be restored when the citizens of Hyrule feel a great emotion of gratitude, usually when Link helps them out, creating other Force Gems as a result of the energy emitted by their spirits. These Force Gems are necessary to completely restore all of the realms' Spirit Tracks as well as to uncover all of the hidden stations, such as the Lost at Sea Station and Disorientation Station. Moreover, Force Gems are attached on top of certain Warp Gates. Link must hit the Force Gems with bombs from his cannon to activate the Warp Gate and allow him to easily transport between realms.

The Battle Mode for Spirit Tracks has Link collecting as many Force Gems within the time limit while also trying to dodge various traps and attacks from Phantoms and other players.

Locations
There are 25 Force Gems in the game. Four of them are restored (rather than collected) after beating the temples. Below is a list of the locations of the 21 extra Gems, which are ordered by place appearance unless otherwise noted.

Trivia

 * At first glance, the Force Gems' appearance seem to be inspired by the gem-like multicolored Triforces from the Zelda cartoon series. However, the Triforces are tetrahedrons and Force Gems are six-sided.
 * In Spirit Tracks, Force Gems share similarities with The Adventure of Link's Crystals, in that they are not so much items Link acquires from completing dungeons, but rather items he restores to those dungeons in order to access the final area.
 * Spirit Tracks Force Gems also share similarities with the Gratitude Crystals from Skyward Sword as they are both received by helping people.