aqeeq stone

Q: I want to ask about aqeeq stone. Can a female wear a black aqeeq stone ring as they cant be in tahaarat in all the time.

Q: In tasheelul akhlaaq wal adaab book 10 it mentions that wearing a ring of agate increases barakah. What is a ring of agate?

Q: I wanted to ask about stones in Islam like aqeeq. Can I wear it because some people say about stones that they suit some people only?