quartz (B2)
noun
Pronunciation: /ˈkwɔːrts/
Definition
A hard, crystalline mineral composed of silicon and oxygen atoms in a framework structure (silicon dioxide). It is widely distributed in igneous, metamorphic, and sedimentary rocks.
Examples
Quartz is a common mineral found in many types of rocks.
The clear, glassy appearance of quartz makes it popular for jewelry.
Geologists study quartz to understand the formation of the Earth's crust.
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