Physically it is related to the hands and lungs. It is said to have a masculine nature, and is therefore more outwardly oriented in its energy expression.
It is an Air sign, and this means that it is connected with communication, mental contact and social principles. It is also a Mutable sign which enhances flexibility and adaptability. Planets placed in this sign will often reflect on personal intelligence, bringing a tremendous curiosity and a need to exchange ideas with other people in a social environment. Negative manifestations of Gemini influences are a flightiness and unreliability, and a tendency to get involved with too many things at any one time. There is a love of ideas, but no inner need to put them into practice.

Nevertheless this influence confers great mental insight, though there is often some kind of split in connection with planets placed in this sign. Planets here manifest considerable versatility and mental skills in regard to all forms of communication