A Japanese professor, Shigeyoshi Osaki, made a new type of violin strings using thousands of strands of spider silk. If you wonder how it sounds and looks like, see below.
In general, violinists use an aluminium-cored or nylon string for their violin (I'm using an aluminium-cored string because they are cheaper than a nylon). A few violinists who can afford to buy use a gut string, but this is more expensive and likely to exhaust than an aluminium-cored and nylon. According to Pro. Osaki, a spider silk string is the best in those strings in terms of tension and sound. Unfortunately, I wasn't able to find any difference of sound in the video... Just it sounded like an ordinary violin to me.
At any rate, if this string is cheap and popular, I'd like to try it. However, it wounld take some time to be so.