By Anne Marie Helmenstine, Ph.D., About.com
Quartz is crystalline silicon dioxide.
William Roesly, www.morguefile.comA B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Definition: a substance in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating three-dimensional pattern. Most crystals are solids.
Examples: quartz, rock candy, halite
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