Gemini gemstones include the stunning white Pearl and Moonstone. These precious stones are thought to symbolise the independence, poise in social situations, and intelligence of Geminis. Citrine and the blue tones of Apatite, Agate, and Aquamarine are some other Gemini Birthstones. It is well known that the yellow/orange colour of a citrine stone bestows onto its possessor feelings of cosiness, cheerfulness, and enthusiasm.