Tags: sonar transducers
Carved in Stone
Q is for Quartz
This versatile mineral has been used in everything from ceremonial rattles to sonar transducers to quartz watches.
By Bill Langer
Quartz (kwôrts) noun – Intensely frozen ice (Gaius Plinius Secundus, 77 A.D.)
Back when our daughter, Kimberly, was a tyke ... Read More...
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