Geodite (CR 2)

Small Elemental (Earth, extraplanar, and psionic)
Alignment: Neutral
Initiative: -1 (Dex); Senses: darkvision 60 ft., Listen +0, and Spot +0
Languages: Common, Terran

AC: 16 (+1 size, -1 Dex, +6 natural), touch 10, flat-footed 17
Hit Dice: 3d8+3 (16 hp); DR: 5/-
Fort +4, Ref +0, Will +1

Speed: 30 ft., burrow 10 ft.
Space: 5 ft./5 ft.
Base Attack +2; Grapple +1
Attack: slam +6 melee
Full Attack: slam +6 melee
Damage: Slam 1d4+4
Special Attacks/Actions:

Abilities: Str 16, Dex 8, Con 13, Int 12, Wis 11, Cha 12
Special Qualities: Elemental traits
Feats: Combat Manifestation; Improved Natural Attack; Power Attack
Skills: Concentration +7, Craft (stonemasonry) +7, Listen +0, Psicraft +7, and Spot +0
Advancement: -

Climate/Terrain: Elemental Plane of Earth
Organization: Solitary or community
Treasure/Possessions: None or 500 gp in gems

Source: Complete Psionic

Elemental stewards devote themselves to lives of servitude, competing with one another to be called to service in the hope that one day a psionic character might call them to serve permanently as an elemental envoy (see the Elemental Envoy feat).

Crystal veins run through the granite body of this little humanoid-shaped elemental. Its crystalline eyes pulse in time to a rumbling, barely audible beat.

Psi-Like Abilities (ML 2nd): 2/day - energy ray (sonic, +2 ranged touch, 2d6-2 damage), create sound, stomp (DC 12)

Geodites inhabit the Elemental Plane of Earth, where they enjoy slowly burrowing through all the mineral varieties of stone with shaped sonic bursts. Geodites have an inborn talent for spatial mapping, and it is said they can never become lost while they stand on stone.

Earth Subtype

This subtype usually is used for elementals and outsiders with a connection to the Elemental Plane of Earth. Earth creatures usually have burrow speeds, and most earth creatures can burrow through solid rock.

Extraplanar Subtype

A subtype applied to any creature when it is on a plane other than its native plane. A creature that travels the planes can gain or lose this subtype as it goes from plane to plane. This book assumes that encounters with creatures take place on the Material Plane, and every creature whose native plane is not the Material Plane has the extraplanar subtype (but would not have when on its home plane). An extraplanar creatures usually has a home plane mentioned in its description. These home planes are taken from the Great Wheel cosmology of the D&D game (see Chapter 5 of the Dungeon Master's Guide). If your campaign uses a different cosmology, you will need to assign different home planes to extraplanar creatures.

Creatures not labeled as extraplanar are natives of the Material Plane, and they gain the extraplanar subtype if they leave the Material Plane. No creature has the extraplanar subtype when it is on a transitive plane; the transitive planes in the D&D cosmology are the Astral Plane, the Ethereal Plane, and the Plane of Shadow.