Warchal Karneol Viola StringsThe KARNEOL string set produces well balanced velvety tones, giving warmth and texture to your sound. They have a synthetic core C, G, D and Metal A, and normally require three days to achieve tuning stability and optimum tone quality. Material Sock Colour Sound Synthetic Core C, G, D Metal Core A Deep Pink Well balanced, velvety tones, warmth, texture