User blog comment:Captain Dashing/Treasure! A Pirate's Goal/@comment-5002950-20120321050906

To rest your opinions about how sapphires can be red, well they can. This is because (and this is my science student side speaking) if there are trace amounts of other elements in a sapphire, like iron, or titanium make the corundum, the mineral sapphires are made of different colours. To make the sapphire red, the element needed in a trace amount is chromium.