noun (n)

• colorless glass made of almost pure silica

  colorless hampir murni silica terbuat dari kaca

  Synonym:
  crystal, lechatelierite, quartz glass, vitreous silica
  

  source: wordnet30
• a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities

  hard glos mineral consisting silikon dioksida dalam bentuk hablur; hadir dalam kebanyakan batu (terutama batu pasir dan granit) ; kuning adalah kuarsa pasir dengan besi oksida impurities

  source: wordnet30
• A form of silica, or silicon dioxide (SiO₂), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque.

  bentuk silica, atau silikon dioksida (sio sub 2/ sub) , terjadi di hexagonal kristal, yang biasanya colorless dan telus, tapi kadang juga kuning, brown, ungu, hijau, warna dan lainnya; juga di cryptocrystalline besar dalam berbagai bentuk dan warna yang tinggi kelutsinaran, kadang menjadi legap.

  source: webster1913