The Ultimate Guide to the Capricorn Birthstone: Symbolism, Healing, and More One of the most charming and glorious stones, Garnet is considered the primary birthstone for the Capricorn zodiac sign, which not only enhances your natural glory but also assists you in the direction of spirituality. The symbolic meaning of garnet encompasses themes of inner strength, fidelity, peace, transformation, serenity, and passion. Being a powerful Capricorn Birthstone, this crystal with its attractive range of colors including deep red, black, pink, & green beautifies the entire journey of its wearers.