Essence of Earth

Essence of Earth is an elemental building block of many crafting recipes. It adds the virtues of strength and endurance to any item.

Source
This item drops from anubisaths, earth elementals, golems, infernals, obsidian destroyers.

It is also sometimes found in Small Obsidian Chunks and Large Obsidian Chunks in Ahn'Qiraj.

This item can also be transmuted using Alchemy (275); taught by Recipe: Transmute Fire to Earth or Recipe: Transmute Life to Earth.

or

Alchemy

 * Transmute: Earth to Life
 * Transmute: Earth to Water

Blacksmithing

 * Thorium Shield Spike
 * Heavy Timbermaw Belt
 * Enchanted Thorium Breastplate
 * Enchanted Thorium Helm
 * Hammer of the Titans
 * Heavy Obsidian Belt
 * Heavy Timbermaw Boots
 * Masterwork Stormhammer
 * Stronghold Gauntlets
 * Thick Obsidian Breastplate
 * Titanic Leggings
 * Jagged Obsidian Shield

Engineering

 * Biznicks 247x128 Accurascope
 * Flawless Arcanite Rifle
 * Force Reactive Disk

Jewelcrafting

 * Onslaught Ring

Leatherworking

 * Volcanic Breastplate
 * Molten Belt
 * Volcanic Shoulders

Tailoring

 * Wisdom of the Timbermaw
 * Mantle of the Timbermaw
 * Robe of the Archmage

Enchanting

 * Enchant Weapon - Strength