Another nice thing about being a female geologist is that I don't feel any need to prove myself with the firmness of my handshake. That whole "I must demonstrate my masculinity by having the strongest grip" thing is foreign to me. Also, as a small female, I think sometimes the people I meet are pleasantly surprised that I don't have a totally limp handshake.
If you are big into the whole "overpowering handshake" thing, please, please do not attempt it when shaking hands with a driller. You know, the person who spends his days picking up extremely heavy cylindrical objects? It will end...poorly.