Plural of 'belaite'; crystals or deposits of the mineral belait.
From 'belait' + '-ite' (suffix for minerals), + '-s' for plural. The '-ite' ending is standard in mineralogy to name minerals and their crystal forms.
In geology, adding '-ite' to something turns it into an official mineral name—so 'belaites' sounds super scientific, but it's really just calling these white deposits by their fancy crystal-class name!
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