Difference between revisions of "Spheres"

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== Appearance ==
Each sphere is made of a tiny gemstone encased in a glass bead, usually flattened on one side to keep the sphere from rolling away when set down.{{book ref|sa1|27}} The glassgemstone beadcan hasbelong ato fixedany sizeone -of athe littleten larger than a person'[[Polestone]]s thumbnail.,{{book ref|sa1twok|38}} Contrastingand thecan uniformitycome ofin theone bead,of thethree gemstonedifferent insidesizes. comesThe inglass abead varietyis ofalways typesa anduniform sizes;size, itslittle typelarger canthan belonga toperson's anythumb one of the ten [[Polestone]]s,nail.{{book ref|twoksa1|83}} and each one of those comes in three different sizes.
 
=== Dimensions ===
Exact measurements for the glass beads or their embedded gemstones are not available, but they can be deduced from a Reddit post by [[Peter Ahlstrom]] where he confirms the weight of each denomination, in carats.{{cite}} The following table lists the mass and diameter of each denomination, assuming a uniform round cut.
 
{| class="infobox" style="margin: auto; align: center;"
|+ Sphere measurements
! '''Denomination'''
! '''Mass''' · <abbr title="carats">ct</abbr>
(carats, ct)
! '''Mass''' · <abbr title="milligrams">mg</abbr>
! '''Mass'''
! '''Diameter''' · <abbr title="millimeters">mm</abbr>
(milligrams, mg)
! '''Diameter'''
(millimeters, mm)
{{row| Chip | 0.1 | 20 | 3 }}
{{row| Mark | 0.5 | 100 | 5 }}
|}
TODO: Sources
#* https://www.gemsociety.org/article/standard-gem-sizes-chart/
#* https://www.diamondnexus.com/product-education-mm-to-catat-weight-conversion.html
 
== Currency ==
The monetary value of each sphere is a direct consequence of causes both mundane (the size of the sphere's gemstone) and arcane (the [[Soulcasting]] properties of each gem type). The gem size defines the denomination of the sphere. From smallest to largest, these are chip, mark, and broam. The gem type is applied as a qualifier to the denomination (e.g. diamond chip, or emerald broam) to form the twenty-seventhirty different monetary units of Roshar.
 
One property of Rosharan spheres that does not affect their value is whether they are infused or dun.{{book ref|twok|17}} However, since the glow from the Stormlight is the easiest way to prove that a sphere is not a counterfeit, people are sometimes suspicious of dun spheres and those who try to spend them. Merchants with access to the proper equipment may inspect the gem quality of dun spheres to ensure their authenticity, or call for a moneylender.{{book ref|twok|3}} Moneylenders serve an additional purpose in Rosharan societies, and that is to offer infused spheres in exchange for dun ones, since an established moneylender usually has access to secure baskets they can safely recharge spheres in. They can extend this service to people interested in recharging their own spheres safely, though this comes with a small convenience fee.{{book ref|twok|11}}
 
=== Value ===
The economic value of each sphere is determined by the type and size of theits gem encased by the glass beadgemstone.
 
The gem size defines the three denominations of spheres (chip, mark, and broam), and therefore a fixed exchange rate between the different denominations of spheres of the same type. Within the same gem type, each broam is equivalent to four marks,{{17s ref|post|18839|Peter says five chips per mark, four marks per broam, and that others are of equal value|date=10 November 2011}} and each mark is equivalent to five chips{{book ref|sa1|3}} - making a broam equal to twenty chips.
 
The gem type worksis a little more complexlycomplicated. The value of each type of sphere - and, therefore, the relative value of all types - is intrinsically tied to how valuable the given gem is in Soulcasting. This makes emeralds -- which can be used to Soulcast grain -- the most expensive kind of sphere,{{book ref|twok|3}} while diamonds are the cheapest. The rest of the sphere types, however, don't all have unique values; instead, they fall within one of three tiers: '''prime pair''', '''middle weight''', and '''less weight'''. Combined with the emerald and diamond spheres, this establishes a system with five distinct value tiers. The table below outlines the five tiers, lists the sphere types within each tier, and provides their monetary value expressed in '''diamond chips''', the smallest denomination of the least valued gemstone.
 
{| class="infobox" style="margin: auto;"
|}
 
== Spheres as Light ==
{| class="infobox" style="margin: auto;"
|+ Sphere values
{{row| Gem type | Chips | Marks | Broams |pre=! width=25% style="font-weight: bold;" {{!}} }}
{{row| Diamond | 1 | 5 | 20 }}
{{row| Garnet | 5{{book ref|twok|17}} | 25 | 100 }}
{{row| Sapphire | 25{{book ref|twok|27}} | 125 | 500 }}
{{row| Emerald | 50 | 250{{book ref|sa2|43}} | 1000 }}
|}
 
The existence of several other spheres is confirmed, but their exact monetary values are currently unknown. They are: ruby chips{{book ref|sa3|i|13}}, ruby marks{{book ref|sa1|3}}{{book ref|sa1|59}}{{book ref|sa2|21}}{{book ref|sa2|68}}{{book ref|sa3|i|8}}{{book ref|sa3|21}}{{book ref|sa3|78}}, ruby broams,{{book ref|sa1|39}}{{book ref|sa2|24}}{{book ref|sa3|7}} zircon chips{{book ref|sa1|55}}, amethyst broams,{{book ref|sa2|9}} topaz chips{{book ref|sa1|63}}{{book ref|sa1|i|7}}, and topaz marks.{{book ref|sa1|30}}
 
== Spheres as Light ==
If left outside during a [[highstorm]], the gemstone inside of a sphere is infused with [[Stormlight]]. Over time, usually around a week,{{book ref|sa3|99}} all of the Stormlight will escape leaving the sphere dun, so it ceases to glow.{{book ref|twok|44}} The amount of light a sphere gives off varies with the denomination: chips barely have any glow at all, marks glow almost as bright as a candle, and broams glow with the light of several candles.{{book ref|twok|3}}
 

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