Difference between revisions of "Fabrial"

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[[Steel]] in contact with a gemstone will likely cause it to push away nearby substances, but artifabrians have not yet figured out how to make repeller fabrials.{{epigraph ref|sa4|11}}
 
=== Modification with aluminumaluminium ===
If a fabrial is used inside a room lined with aluminumaluminium, it is impossible to sense the use of the fabrial from outside of that room. If the fabrial requires outside connection (e.g. conjoiner, and specifically spanreed), the conjoined half outside of the room will not function properly because the pairing has been interrupted. If the fabrial can be used entirely within the room (e.g. a Soulcaster), it will operate as designed but be undetectable from outside.{{book ref|sa3|81}}
 
It is possible to alter the function of a conjoiner (ruby) fabrial to transfer only certain components of motion between the conjoined halves (e.g. A spanreed that can only transfer vertical motion, but not lateral) by inserting pieces of aluminum foil into the fabrial gemstone housing. It is thought that aluminum impacts a spren's ability to sense thoughts, and therefore this may function by blocking parts of the "signal" between the two gemstones.
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