Crayons with labels showing the chemicals used to make up the colors. Via QueInteresante on Etsy.
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want
—-The nerd in me says “yes”.
(via v0dka-rain)
With a Mohs hardness of 9, I don’t think the color would transfer very well, unless you’re drawing on...
“Lithium flame” and “Calcium flame” seem like giveaways there.
I’m pretty sure that those are the elements that those crayons approximate. Who would use literal ruby in a red crayon?