Crystalline blank" >target="_blank" >silica. A hard, brittle mineral breaking with a glasslike blank" >target="_blank" >fracture, and usually blank" >target="_blank" >glossary/transparent/" class="glossaryLink" data-cmtooltip="27850be3901d7151942754fd21a19c80" blank" >target="_blank" >transparent toblank" >target="_blank" >glossary/translucent/" class="glossaryLink" data-cmtooltip="32ea7a7d2cf92e408c8de9be74ac0d67" blank" >target="_blank" >translucent, and colorless, or of a white, pink, and amethystine hue. (Sturgis, 1900)