Oh I love serpentine! I have a few rough pieces I just love to work with.
What a nice gift
Enjoy it.
What does it look like? Is it a light green/yellowish color? or spotty like?
if it's light green I think its also called infinite stone, anyway here's what I know about it:
It's a great stone to help you be in control of all areas of life so yes it will aid in helping you to concentrate.
It has gentle energy and is good for accessing past life memories and eases emotions from bad and dysfunctional relationships from your past that are still haunting you in the present. It allows you to openly talk about the past, and understand better so that you can put it behind you and move on.
Its good for sore muscles and menstrual cramps too.
It works best with the crown chakra but will help clear all chakras. Balances and helps to control emotions. It is great for meditation, spirituality and and increases psychic ability and intuition.
It's also a blood cleanser, and helps to balance sugar in the blood.