Spirit Quartz, also known as Cactus Quartz, is a very special kind of quartz, because its core crystal is encrusted with hundreds of tiny crystal points. Because of this, the energy of the core crystal is said to be magnified by each additional point. Spirit Quartz is known as a crystal of Harmony and Alignment. The color of Amethyst color evokes passion and imagination, emotion and logic. It stimulates creativity and is particularly helpful in artistic endeavors. Amethyst is the traditional birthstone of those born in February, and is associated with the sign of Pisces.