the dioxide of silicon SiO2 occurring in crystalline amorphous and impure forms as in quartz opal and sand respectively

the dioxide of silicon SiO2 occurring in crystalline amorphous and impure forms as in quartz opal and sand respectively
Crossword Clue
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Answer	Crossword Clue
silica	the dioxide of silicon SiO2 occurring in crystalline, amorphous, and impure forms (as in quartz, opal, and sand respectively)

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.

the dioxide of silicon SiO2 occurring in crystalline amorphous and impure forms as in quartz opal and sand respectivelyCrossword Clue