It’s not reddish brown, it’s not reddish purple, it’s not reddish pink. It’s red,” she said. Farfan invited seven experts to examine the diamond. This study generated a paper that will appear in Gems ...

"A significant number of these gemstones are reportedly unstable, with the colours fading to almost white or light pink tones, or, in the case of irradiated rubies, turning dark red over time." “More ...