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Metals and Gemstones: why the Polestones should be able to store other types of Investiture; and also White Sand, Taldain's sun and Investiture Radiation


Honorless

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A small theory that I think got some solid support with RoW.

So we saw in Rhythm of War that the Allomantic/Feruchemical/Hemalurgic metals have functions outside of the Metallic Arts and are one of three key components in fabrials alongside spren & gemstones.

It makes sense, metal acts as a key for Allomancers to access Preservation's Investiture. Without Allomancy in your Spiritweb, you can't access that Investiture but you should still be able to use the metal to filter other Investiture that you do have access to.

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Questioner

Mistborn travels to Roshar, what does he or she use to get Invested?

Brandon Sanderson

*pause* So. *pause* I think I've talked about this before on the 17th Shard, but I'm not 100% sure and so I don't want to anything right now, not knowing what I've said. But you can look it up. You can ask Peter. Hey Peter, have I talked about someone using-- Have I ever in an interview before talked about using metals... A Mistborn travels to Roshar and uses the metals there?

Peter Ahlstrom

I think that you have said that they could do it.

Brandon Sanderson

I said it.  Okay, so the thing about the metals you have to understand is the metals are a key, the metals are not magical themselves, except for specific ones. If I've already said that I can tell you, go to Roshar and you could use the metals that are there to power your Allomancy because the difference is in your soul and you're actually drawing directly from Preservation. Remember that on the Spiritual Realm, this is the big tidbit--they're listening. On the Spiritual Realm time, distance, and space are irrelevant. It's a place where time and space are compounded in one. So anything that exists on the Spiritual Realm, space doesn't matter for it.

Shadows of Self release party (Oct. 5, 2015)

That is kind of similar to how the Polestones themselves function, why they can hold Lights

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ArsenoPyrite

I have a technical question here re: gemstones in The Stormlight Archive. How are the lines drawn between different types of gem? Emerald and Heliodor are both varieties of the mineral beryl. Emerald can get its color from trace amounts of chromium, vanadium and/or iron. Heliodor gets its color from iron combined with microscopic crystal defects. So, is the line between these two defined by color? If so, would a heliodor lose its usefulness if it were heated (which would turn it colorless or pale blue). Is it defined by trace elements--in which case, how do you deal with emeralds, or with aquamarine (the blue variety of beryl, which can also contain chromium or vanadium in small quantities and is mostly colored by iron). Sorry for getting so technical, but this gem nerd needs to know!

Brandon Sanderson

I actually spent a long time working on this while building the world. You'd probably be amused by how long I spent on it. Chemically, many of them are actually very similar, as you pointed out. I tried doing the book originally with them all being different, not using any that were basically the same crystal with different colors, but it didn't work out. There weren't enough, and so I had to stretch to make it all work.

So, I went back to the original, and decided that color was enough to differentiate them. Just as steel and iron are very similar in the mistborn world, Emerald and Heliodor can be very similar--but produce different effects. The idea here is that the physical items (like the metals or the crystals) provide a key by which magical interaction occurs.

So, in a long winded answer, a gemstone with an impure color would be considered like a bad alloy in the Mistborn magic--it either wouldn't work at all, or would work very poorly. The chemical and color signature needs to be of a specific variety to provide the proper key to accessing the power of transformation.

/r/fantasy AMA 2013 (April 15, 2013)

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Shadow Guardian

If an Awakener were to go to Roshar and were to bleed the color from a gem would that gem still be able to store Stormlight?

Brandon Sanderson

Bleed the color from a gem… Um ye-ye-ye-yeah. This would interfere with its function on Roshar. It would probably still be able to hold Stormlight…

Shadow Guardian

Might not be able to be used for Soulcasting?

Brandon Sanderson

Yea-- It's going to… You know what no it would just change it. It would just bleed the color from it and turn it into a dusty quartz or something like that. That's probably what it would end up with, a dusty quartz. Because the molecular structure doesn't matter as much as the color for Roshar. So yeah you would probably still be able to hold Stormlight because a diamond can but I don't know, quartz might cut it. You'd probably end up with something that's not going to work so well.

Questioner 2

What about a fabrial that needs a specific--

Brandon Sanderson

Yeah a specific-- A ruby wouldn't work any more, and it would let go whatever is captured inside.

Bands of Mourning release party (Jan. 25, 2016)

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zas678

If an Awakener went to Roshar and bled color from a gem, would this gem still hold Stormlight?

Brandon Sanderson

If an Awakener bled-- No it would-- Oh wait yes it would because a colorless gem could still hold Stormlight. It just would not have--

zas678

Would not have the properties of the original color.

Brandon Sanderson

Yeah, the color is integral to what's going on because molecularly some of these gems are the same except for the different coloring. The coloring is kind of what--

zas678

What defines what magic.

Brandon Sanderson

Yeah. It has to with fabrials and some of the effects, and that relates directly to the spren and what spren-- anyway.

Holiday signing (Dec. 12, 2015)

Their small differences in chemical structure & colour is all that is needed for Investiture to distinguish them.

An element's atomic structure absorbs and reflects different wavelengths of light (or Light), the light can be used to identify those atoms & molecules. A metal's structure is used as a filter for Investiture, the same probably goes for a gemstone. Colour is more important magically for gemstones but this is what the colour of an object means in physics & chemistry, their molecular structure would be a bit different. A metal acts as a filter and lets Investiture through and a gem both filters it (what gem you use does matter for Soulcasters and Artifabrians) and holds it.

 

So, gemstones should, like metals, work across the Cosmere, and be able to hold other types of Investiture than just the Rosharan Lights.

 

Idea came from here:

Edit: we have confirmation that the Mists can be trapped in gemstones

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BubblesS0AR

Could you have trapped the mists from Scadrial in a gemstone.

Brandon Sanderson

Theoretically possible.

YouTube Livestream 32 (June 3, 2021)

Edit: in the Brandon spoiler livestream 

at 33:20, Brandon confirms that Autonomy's Investiture can be stored in the Polestones but he isn't sure if that is something that could happen naturally (but it could definitely capture the Dor) and even if it does, it would be very ineffective, maybe it would store very little bit of charge that would only be perceptible to someone with the right instruments and it would soon dissipate.

I've noted previously in discussions that White Sand requires surprisingly little Investiture to recharge. I think the oldest instance of this theory is here:

While it takes four hours for black sand to recharge back to white sand on Taldain's Dayside, just proximity to Shallan's Lightweaving was enough to charge Hoid's white sand in OB, this happened when Kal, Shallan, Adolin and Elhokar went to Kholinar. In the very same section and following section that took place in Shadesmar, it is noted that Shallan's Lightweaving used far less Stormlight than Kaladin's Lashings. Keep this in mind.

I do have an idea on why White Sand could apparently recharge from Taldain's sunlight or apparently even from very far from its starlight as per a prev WoB, but would be difficult to store in a gemstone. In RoW, we see Navani use a prism to separate the light emitted by Towerlight back into the bands of Stormlight and Lifelight, she notes that she didn't separate the Lights or the Investiture, just the "Investiture radiation". I think that's what Taldain's sun outputs: not gaseous Investiture but Investiture radiation. And that's why it outputs so little Investiture that it takes black sand exposure to direct sunlight for four hours in order to recharge and turn white again but Stormlight, even sheer proximity to a Lightweaving, which in itself is noted to use much less Stormlight compared to Surge of Gravitation.

Edited by Honorless
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Wait i don't get it. So didn't navani split the towerlight back to Stormlight and lifelight. I mean what's the difference between the investiture radiation and investiture ? 

Like investiture glows ? And that glow has diluted power of investiture ? 

Also if white sand can be recharged by starlight ...well that would take like yrs depending on the distances between stars and the inverse square law between intensity of radiation and distance. 

Also the mists don't glow right. Wonder if they do. Just a little bit maybe.  

Edited by Friendshipspren
Blep
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On 12/19/2021 at 9:44 PM, Friendshipspren said:

Wait i don't get it. So didn't navani split the towerlight back to Stormlight and lifelight. I mean what's the difference between the investiture radiation and investiture? 

Like investiture glows ? And that glow has diluted power of investiture ? 

Also if white sand can be recharged by starlight ...well that would take like yrs depending on the distances between stars and the inverse square law between intensity of radiation and distance. 

Also the mists don't glow right. Wonder if they do. Just a little bit maybe.  

Presumably, just fewer quanta of Investiture in Investiture radiation compared to gaseous Investiture, it may just be more diffuse, just like liquid Investiture seems to be a more concentrated version of Investiture and solid Investiture / godmetals even more so.

I don't think Navani was ever able to split the Towerlight back into Stormlight and Lifelight. She was just able to mix Stormlight and Lifelight into Towerlight together with the Sibling, just like she did Warlight together with Raboniel.

Edit: oh, just realized what you meant. Navani was not able to split Towerlight back into Stormlight and Lifelight, she was only able to split the light emitted from the prism back into Stormlight and Lifelight colours. She was able to split the Investiture radiation. Here:

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"I couldn’t get Lifelight and Stormlight to recombine, but I don’t know if this counts as truly splitting them apart—as I’ve only split their radiation, not the pooled Light itself."

Yeah, the WoB in question is this:

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swieczq

Would someone with enough knowledge be able to use Autonomy’s Investiture if Taldain’s star was seen from his world?

Brandon Sanderson

So I’m on a world and I see Taldain’s star, what you're asking if someone could use the Investiture? Oh, OK I see. Yeah yeah yeah yeah. That’s good! You stumped me. I haven’t gotten that question before. I would say yes, if the light particles are reaching you. I mean technically you could use the light from one of those stars to power a solar sail so…

Kraków signing (March 21, 2017)

And yeah, if it takes four hours of direct sunlight, it would probably take a loooooooooong time to recharge from just a bit of distant starlight

Edited by Honorless
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On 19.12.2021 at 5:14 PM, Friendshipspren said:

Wait i don't get it. So didn't navani split the towerlight back to Stormlight and lifelight. I mean what's the difference between the investiture radiation and investiture ? 

Like investiture glows ? And that glow has diluted power of investiture ? 

Also if white sand can be recharged by starlight ...well that would take like yrs depending on the distances between stars and the inverse square law between intensity of radiation and distance. 

Also the mists don't glow right. Wonder if they do. Just a little bit maybe.  

Investiture leaked back to the Spiritual Realm. This Investiture Radiation can be literally this - little amounts of Investiture spreading around from Lights.

If im not mistaken, white Preservation Mists are shiny a little. Also, there was quote about "Ettmetal glowing brightly like Allomancy" while working - and Ettmetal is Harmony's Godmetal.

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