Does each month have 2 birthstones?

Yes, each month has two birthstones. The first stone is the traditional birthstone for that month, while the second is a more modern addition. For example, the traditional birthstone for January is garnet, while the modern birthstone is rose quartz. February's traditional birthstone is amethyst, while the modern birthstone is bloodstone. March's traditional birthstones are aquamarine and bloodstone, while the modern birthstone is jade. April's traditional birthstone is a diamond, while the modern birthstone is an opal. May's traditional birthstones are emerald and chrysoprase, while the modern birthstone is turquoise. June's traditional birthstones are pearl and alexandrite, while the modern birthstone is the moonstone. July's traditional birthstones are ruby and carnelian, while the modern birthstone is onyx. August's traditional birthstone is peridot, while the modern birthstone is sardonyx. September's traditional birthstones are sapphire and lapis lazuli, while the modern birthstone is iolite. October's traditional birthstones are opal and tourmaline, while the modern birthstone is pink tourmaline. November's traditional birthstones are topaz and citrine, while the modern birthstone is pearl. December's traditional birthstones are turquoise and zircon, while the modern birthstone is tanzanite. As you can see, there are many beautiful birthstones to choose from, whether you prefer traditional or modern stones!