Golden Pearl

Golden Pearl is a pearl, commonly used in tradeskills.

Source
They are found inside Big-Mouth Clam and as drops from Naga in level 40-50 areas such as Dustwallow Marsh and Hinterlands.

As an ingredient
Golden Pearl is used in the following recipes:

Enchanting

 * Runed Arcanite Rod
 * Enchant Weapon - Spellpower

Tailoring

 * Argent Boots
 * Gloves of Spell Mastery
 * Mooncloth Robe
 * Mooncloth Gloves
 * Truefaith Vestments