Why am I unable to stay calm even after meditation?

Name: Rohan Malhotra

Date of Birth: October 10, 1992

Time: 6:15 PM

I meditate regularly but still my thoughts are restless and I still dont still peace. I have seen people meditate with crystals with them and I feel like trying this. Guruji, could you pleasr enlighten me with how to use crystal and use them properly?

Place: Delhi, India