Violin strings are made from a variety of materials, including gut, synthetic materials, and metal. Historically, most strings for bowed instruments, including violins, were made from animal intestines, but they were never made from cat intestines, despite the common misconception. Gut core strings are still used today, but they are less durable than steel or synthetic core strings. Steel core strings, also known as steel strings, are a common choice for violinists as they produce a bright, full sound when played with. Synthetic core strings are also popular and are known for their stability and longevity. The outer layers of violin strings can be coated or wound with a variety of materials, including aluminum, silver, gold, and titanium. Ultimately, the choice of violin strings comes down to personal preference and price range.