Why is this Gem the RAREST Sapphire?! Unipro2013main 4 years ago Jewels and Gemstones In this week’s Unboxing, Natalie unboxes one of the rarest and most expensive sapphires around, a Padparadscha sapphire! Watch along as she goes in-depth into the characteristics of Padparadscha and where to find it! Credit JTV