Sapphire – The mineral variety of corundum known as Sapphire can be found in all colors except red, which would then be a Ruby. One of the most popular Sapphire colors is the rich vibrant blue hue. Sapphires are one of the most popular and one of only four precious gemstones; they are featured as September’s birthstone. The Logan Sapphire is one of the world’s most famous and largest flawless Blue Sapphires known