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“It's so beautiful and red." Pippa nodded. "That's the chromium." "The what?" "Chromium. It is an additive in the crystal that turns it red. If it were anything else added... it wouldn't be a ruby. It would be a sapphire." Olivia blinked, and Pippa continued, "It's a common misconception that all sapphires are blue, but that's not the case. They can be any color... green or yellow or pink, even. It depends on the additive. But they're all called sapphires. It's only if they're red that they're called something else. Rubies. Because of the chromium.” — Sarah MacLean
It's so beautiful and red."
Pippa nodded. "That's the chromium."
"The what?"
"Chromium. It is an additive in the crystal that turns it red. If it were anything else added... it wouldn't be a ruby. It would be a sapphire." Olivia blinked, and Pippa continued, "It's a common misconception that all sapphires are blue, but that's not the case. They can be any color... green or yellow or pink, even. It depends on the additive. But they're all called sapphires. It's only if they're red that they're called something else. Rubies. Because of the chromium.