Flashing with tones of peacock blue, insect green, neon peach and mesmerizing periwinkle, there is a captivating, magical quality about opal jewelry. Traditionally the birthstone representing October, the mythical origins of this stone are as mesmerizing as the opal itself. Believed to have fallen from the sky in lightening flashes by the Ancient Greeks, this stone is also described as the 'ultimate gem'. It can be emotionally supportive and mood stabilizing and if you are drawn to a particular opal, it is advised you wear it for its inherent powers. Tourmaline is the modern pick for October birthstone jewelry - perhaps a little more understated, it ranges in tone from blue to green to pink.