Red Dragon Scales

Red Dragon Scales are a component which can be fashioned into armor by Cromwell in Athkatla Docks. He can make Red Dragon Scale from it. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition. It's dropped by the dragon Jierdan Firkraag in the dungeon in the Windspear Hills.

In-game description
"There are a large number of scales salvaged from the red dragon. Legend has it they can be magically forged into powerful armor."