The color of choice for Mercury in Gemini is GREEN
Your starstone is the moss agate. It has been shown to be beneficial to the health of Geminis who are suffering from circulatory problems and has been shown as an aid to getting your intuitive feelings tuned to a higher pitch. It is also an aid to relieving depression.
There is another gemstone which is used for Gemini and that is the emerald, but the moss agate vibrates to the levels of your ruling planet, Mercury, and therefore is much more beneficial for you.
Variety in life
Multiple projects all going at once
Feeling tied down
Learning, such as schoolBeing in a rut