Shift click to unstack.
A Chromatic Orb is a currency item that can be used to re-roll the colour of sockets on a weapon or piece of armour.
Sockets are more likely to roll a colour corresponding to the attributes of the equipment being altered. The higher the attribute requirements, the more likely it is to roll the relevant color: red sockets for Strength, green sockets for Dexterity, and blue sockets for Intelligence. It's only possible to get red, blue or green sockets using this orb; for white sockets it's necessary to use a 
Vaal OrbVaal OrbStack Size: 10Corrupts an item, modifying it unpredictablyRight click this item then left click an item to corrupt it. Corrupted items cannot be modified again.
Shift click to unstack.
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Chromatic Orbs can be obtained by vendoring an item with at least 3 linked sockets in 3 different colors.