Blue Topaz vs Amethyst: The Ultimate Comparison Blue topaz is a charming crystal that captivates individuals with its entrancing blue color and metaphysical qualities. This stunning gemstone isn't just the birthstone for December but in addition, an image of affection, love, and loyalty when worn as gemstone jewelry. From the beginning of time, blue topaz has been adored for its relationship with wisdom, knowledge, and fortune. Antiquated Greeks may also have believed that it could help upgrade intelligence and power, while the Egyptians assumed that it could protect their pharaohs from hurt.