Os elementais podem ver, não têm imunidade aos ataques do olhar e não têm imunidade à petrificação. Como tal, sim, eles são suscetíveis aos efeitos do olhar petrificante.
Veja as regras Tipo Elemental :
Elemental
An elemental is a being composed of one of the four classical elements: air, earth, fire, or water.
Features
An elemental has the following features.
- 8-sided Hit Dice.
- Base attack bonus equal to ¾ total Hit Dice (as cleric).
- Good saves depend on the element: Fortitude (earth, water) or Reflex (air, fire).
- Skill points equal to (2 + Int modifier, minimum 1) per Hit Die, with quadruple skill points for the first Hit Die.
Traits
An elemental possesses the following traits (unless otherwise noted in a creature’s entry).
- Darkvision out to 60 feet.
- Immunity to poison, sleep effects, paralysis, and stunning.
- Not subject to critical hits or flanking.
- Unlike most other living creatures, an elemental does not have a dual nature—its soul and body form one unit. When an elemental is slain, no soul is set loose. Spells that restore souls to their bodies, such as raise dead, reincarnate, and resurrection, don’t work on an elemental. It takes a different magical effect, such as limited wish, wish, miracle, or true resurrection, to restore it to life.
- Proficient with natural weapons only, unless generally humanoid in form, in which case proficient with all simple weapons and any weapons mentioned in its entry.
- Proficient with whatever type of armor (light, medium, or heavy) that it is described as wearing, as well as all lighter types. Elementals not indicated as wearing armor are not proficient with armor. Elementals are proficient with shields if they are proficient with any form of armor.
- Elementals do not eat, sleep, or breathe.
Nada disso diz que os elementais não vêem, nenhum deles menciona imunidade para olhar ataques ou petrificação. Então eles são vulneráveis a todas essas coisas. Um teste de Conhecimento razoavelmente baixo (os planos) poderia significar que o Clérigo estava ciente disso antes de convocar a criatura.