Diamonds may be a girl’s best friend, but I’m more than happy to make acquaintances with rubies, emeralds, sapphires and any other precious stone that comes my way. If it sparkles and shines, I want it! So join me on a tour of the year’s most beguiling gems: birthstones. Each month is assigned a stone (or two), but who can ever remember them all? And what do they even mean?