Month Modern (Faceted) (Cabachon) Ancient January Garnet *** Garnet February Amethyst *** Amethyst March Aquamarine Bloodstone Jasper April Diamond *** Sapphire May Emerald *** Agate June Alexandrite Pearl/Moonstone Emerald July Ruby *** Onyx August Peridot Carnelian Carnelian September Sapphire *** Chrysolite October Pink Tourmaline Opal Aquamarine November Topaz Citrine Topaz December Blue Zircon Turquoise Ruby