Hoʻohana ʻia ia no ka lawe ʻana i ka hao a me ka hoʻomaʻemaʻe ʻana i nā minela non-metallic i ka hoʻomaʻamaʻa pulu, ʻoi aku ka nui o ka hao hao e hoʻoneʻe i nā minerala ʻole e like me ke one quartz, potassium feldspar, a me ka soda feldspar. nā minerala magnetic e like me ka hematite, limonite, specularite, siderite, manganese ore, a me ka tantalum-niobium ore.