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The God King walks into a Rosharan bar... ...and every fabrial in the building breaks? Polestones are what largely define what kind of fabrial can be made to the extent that inspecting a polestone and the metals used in a fabrial allows an artifabrian to reverse engineer a fabrial. Awakening and draining color from a gemstone apparently works, so what happens if those colors are merely distorted? It doesn't have to be a permanent change, just enough for the spren to be released. Even if it doesn't, if it simply disrupts the fabrials that could still be pretty useful. The core question: Are spren held by the hue, value, or intensity of the color of the light, and which of these scales are altered by Biochromatic Auras? Do BioChromatic auras alter color enough to break Rosharan fabrials, particularly in the case of the 10th Heightening or Nightblood? Thoughts? Applications? Unusual rock/paper/scissor element here?

In this post I tried to aswer to a doubt of mine. I thought it was a well known fact that I only missed. The unsure answers pushed me to ask both to Brandon and Peter on Twitter and the second gave me a much more vague answer Also if I don't recive a sure answer, now I know that it isn't something explored in the books and maybe may hide some worldbuilding information about Roshar and the GreatShell's Spren-bond. It's even possible I was right about the idea exposed in my tweet (but I am not too sure about)

I am in the middle of a WoTK second reading and I just notice a big ignorance of mine about Roshar's Ecology. On Roshar only the 10 Polestones may naturally store Stormlight. We know also that many GreatShells (possible all) have a gemheart, a gem of possibly great size (depending by the Greatshell's size). Now began my great doubt: How is the gemheart type decided ? I explain myself better. when you kill a Greatshell and retrive his Gemheart. There are rules about what kind of Polestone this Gemheart would be ? For example: all the greatshell for a specific species give the same Polestone as Gemheart or it's a complete random factor. In the books is often stated that the Alethi and the Listeners hunt Charsmfields to retrive their gemheart to soulcast food, this mean that from the Chasmfields they may retrive Emerald but I think it's never stated that all the Chasmfiends's Gemheart are Emeralds.