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Best answers for Glassy volcanic rock – Crossword Clue


Answer: obsidian


Clue Length Answer
Glassy volcanic rock4 lettersmica
  1. Definition: 1. any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity

Glassy volcanic rock8 lettersobsidian
  1. Definition: 1. acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces


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