In the event you have posed the question of what is the birthstone of Gemini you will find that it is not a single stone but it is a group of stones that best fit this versatile sign. The main Gemini birthstone is agate, which is what is believed to ground Gemini and bring his faceted mind into focus. Pearl signifies purity and emotional justice, which helps Geminis in controlling their not always calmed emotions. The fact that the color of Alexandrite can be changed indicates the flexible and dichotomous nature of Gemini. These rocks collaborate with each other to improve the positive attributes of Gemini such as communicative abilities and intellectual dexterities. Wearing the Gemini birthstone, is not just a style of dressing, but a means of aligning oneself to the energies, which help project the multi-faceted personality of Gemini.