1. The quartz
in his pocket made little sound.
2. To this class of substance belong mica, porcelain, quartz
, glass, wood, etc.
3. What we do know is that the earliest lenses were made from quartz
and were usually set into bone, metal, or leather.
1. colorless glass made of almost pure silica
2. a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especial
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