Symbol 42:20
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42:20 ·
This sign structure is sometimes used to
indicate an inn on maps
and a mosque on
nautical charts. Mosque is also drawn 
and
.
Turned around to 
or 
it
was used by the alchemists to signify calcinated copper, or copper
oxide. This
substance, however, was more commonly drawn 
and
otherwise.
According to some sources this sign was also used on the banners of
the troops of the Mongolian empire in the thirteenth century.