Padparadscha is an extremely rare, pinkish orange sapphire. It's the only number of corundum besides ruby that's given its name, instead of being known as a sapphire of the particular colour. The name derives from the Sinhalese word, meaning lotus blossom.
This really is mainly present in Sri Lanka.
Like several types of corundum, padparadscha is a superb jewellery stone, because it is second and then diamond in hardness.