Ko te karaehe he taonga kore-whakarewa amorphous, he mea hanga mai i te maha o nga kohuke pararopi (penei i te kirikiri kiripaka, borax, waikawa boric, barite, barium warowaiha, kowhatu kowhatu, feldspar, houra pungarehu, me etahi atu) hei rauemi mata matua, me te iti o nga rauemi mata awhina ka taapirihia.o.ahau...
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