QUARTZ MINES RAMBLE

The word "quartz" comes from the German About this sound Quarz which is of Slavic origin (Czech miners called it křemen). Other sources attribute the word's origin to the Saxon word Querkluftertz, meaning cross-vein ore
Quartz crystals have piezoelectric properties; they develop an electric potential upon the application of mechanical stress. An early use of this property of quartz crystals was in phonograph pickups. One of the most common piezoelectric uses of quartz today is as a crystal oscillator. The quartz clock is a familiar device using the mineral. The resonant frequency of a quartz crystal oscillator is changed by mechanically loading it, and this principle is used for very accurate measurements of very small mass changes in the quartz crystal microbalance and in thin-film thickness monitors.

from: http://en.wikipedia.org/wiki/Quartz

Category:

Travel & Events

Tags:

• quartz mine
• chapada dos veadeiros
• leolopes108 nature outdoors

[MsMarymoraes]

isn't the same video of paliplan??

bjoka

visto***

[oasisimaginario]

@MsMarymoraes Não amore...é o mesmo BONÉ que vc me deu de presente (adoro ele)...mas o video do palipalam é em outro local e feito em outra ocasião...

[MsMarymoraes]

eu o vi anteontem.... talvez eu tenha so assimilado, ou seja o msm vale.