kernite

Noun
  1. A light soft mineral consisting of hydrated sodium borate in crystalline form;
    An important source of boron (synset 114703428)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym: atomic number 5, b, boron - a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

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