The plural form of 'borax,' a mineral compound of boron and sodium used for cleaning, in glass-making, and in other industrial applications.
From 'borax,' ultimately from Persian 'burāk,' which entered European languages via Arabic; the Latin plural '-es' was traditionally used for certain mineral names in scientific contexts.
Boraces (borax) was so valued historically that it became part of the Silk Road trade routes—this humble white mineral was as precious to medieval alchemists and glass-makers as it is to modern chemists, showing how some materials maintain industrial importance across centuries.
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