No, you have to open it… it’s not recommended to go opening random signs unless you trust the source. People have been known to sit parasites and curses behind them, it’s a sort of magick trolling that has caused problems on the forum in the past.
For this reason its a good idea to put unknown sigils behind a spoiler. I have added a “blur spolier” to the above pic for safety. People who are interested and confident they can handle any possible issues can help themselves.
The following sigils are popular and have been tried and tested to work as expected: