Geomancers use bells as weapons, and equip light tunics as armor. They can walk across dungeons without fear of traps, like pitfalls, or damaging floors, like lava. Their signature skill is Terrain, which lets the Geomancer execute special attacks based on the terrain the party is fighting on.
The Geomancer is a job gained from the Water Crystal in the NES version, while it is gained from the Fire Crystal in the 3D versions. Geomancers are able to attack by tuning in to their natural surroundings and drawing out the latent powers around them. Essentially, a Geomancer is like a Mage who can unleash powerful "magic" attacks with no MP cost.
The Geomancer class is obtained from a shard of the shattered Fire Crystal. When in battle, the job makes use of the terrain for various results.
Geomancer (GEO) is one of the two jobs introduced in the Final Fantasy XI: Seekers of Adoulin expansion. Geomancers command the power of geomancy in the form of elemental attack magic and special magical fields called colures—emanations that emanate from a point and bolster allies or enfeeble enemies within their radius of effect. Indi-colures emanate from the body of the Geomancer him/herself, while Geo-colures emanate from special objects called luopans.
In Final Fantasy XIV: Stormblood, Geomancers do not appear as a playable job, though non-playable Geomancers feature heavily in the Astrologian storyline. They originate from Hingashi on the continent of Othard. Geomancers and Astrologians are said to both draw power from the stars, with Geomancy focusing on the "star" below (the Source itself) and the powers of its wind, earth, and water. Geomancers' abilities and weapons are similar to ones used by Conjurers.
The Geomancer uses the battlefield to cause damage to the opponents as well as inflicting status effects. Monk level 4 is required to unlock this job.
Geomancer is a job available to gria. It uses weather and terrain to attack the enemy, and is the only magick-based gria job. They wield poles and wear robes and light clothing as armor. It is advised to level the party's gria up as a Raptor to use this job to its full magickal potential, because the Raptor job class has the highest Magick growth of all gria jobs.
Class Fourth Moogle of the Cranberry Knights represents the Geomancer job class.
The Geomancer appears as a job card in the Labyrinth mode, allowing the player to take special equipment out of the Labyrinth when setting a tent.
The Geomancer appears as a character card.
The Geomancer is a job available after logging into the game seven times. The preferred weapons for the job are instruments and axes. The job specializes in agility abilities.
The geomancer can summon the powers of nature, but not always control them.Description
The Geomancer is a character available to the party, he uses the Branch Spear ability during battle. He unlocks at level 17.
Geomancer is unlocked along with Alchemist. Geomancer has well-rounded stats, and receives a small boost to an individual stat depending on the terrain the Geomancer is currently standing on. Geomancer can equip bells and clubs, and is the only job that is proficient in Club Skills. Equipping a bell allows the use of club skills, and both clubs and bells can be dual wielded after job mastery. The club skills repertoire grants the ability to inflict a number of status ailments upon enemies.
The Geomancer job appears in Final Fantasy Trading Card Game as Backup and Forward cards of multiple different elements.
The Geomancer class featuring Arc from Final Fantasy III appears on Triple Triad cards in the version available via the Final Fantasy Portal App.
Non-Final Fantasy guest appearances
The Geomancer appears on a silver card.
As a crossover collaboration with Final Fantasy Airborne Brigade, the Resident Evil smartphone card battle RPG Minna to BIOHAZARD Clan Master boasts character Rebecca Chambers as a Geomancer. This is likely in correlation that she is a constantly traveling and active agent of the Bioterroism Security Assessment Alliance, and how she was the first expert in utilizing the species of medicinal herb native only to the Arklay Mountains of Raccoon City via administration to bioweapons and zombie attacks.
Behind the scenes
During the development of Final Fantasy VII, Aeris was to have the Geomancer class, but in the finished product is not specified as having a job. As a Cetra, Aeris can commune with the planet, and many of her Limit Breaks manifest as her drawing power from the earth.
Prior to the release of Final Fantasy X-2 International + Last Mission, Square Enix held a dressphere design competition to have a contestant's artwork turn into a job within the Interntional release of Final Fantasy X-2. One of the finalists, Xavier Garcia, had his Geomancer (ジオマンサー, Jiomansā?) concept considered, but was ultimately denied in favor of the Festivalist dressphere. 
In Final Fantasy XII, there is a garif in Jahara in the Lull of the Land area named "Geomancer Yugelu". After the player has acquired at least ten Espers and has completed all the garif-related hunts, he will speak of Zodiark and gives the player access to the Special Dig area of the Henne Mines.
Geomancy (Greek: γεωμαντεία, "earth divination") is a method of divination that interprets markings on the ground or the patterns formed by tossed handfuls of soil, rocks, or sand. Geomancy is derived from the roots geo- (Earth) and -mancy (prophecy). Geomancy was one of the original ways to translate Feng Shui, since it predicts things by the elements similar to astrology with the stars.
Its Japanese name, Fūsui or Fūsuishi (風水士), refers to the Chinese feng shui. Feng shui is the Chinese studying of the direction, geography and/or weather to calculate the individual's fortune who resides or works in that place. Bells are used in the craft as instruments to dispel negative energy and stimulate positive energy. This is why Geomancers equip bells as weapons.
- Final Fantasy X-2 - Ultimania Omega, p.591