Yes, aluminum coils can be used for making jewelry. Aluminum is a lightweight, durable, and affordable metal that is often used in costume jewelry and for decorative purposes. It can be easily shaped, bent, and manipulated into various forms, making it suitable for creating intricate designs. However, it's important to note that aluminum is a softer metal and may not be as durable as other metals like stainless steel or silver, so it may not be ideal for pieces that will be worn daily or subjected to significant wear and tear.