Quarz? Crystal? what is it?

[Guest]

Hi

Some cars need to join the contacts of the quarz.

Is someone here can explain what to do with the quarz, crystal?
How to recognize it?
How to joint its contacts?

If you have pictures thanks to send it here, I think lot of people really wants to know this!

Thank you everybody

ps: sorry for sending this post severals times, I need to know this quickly...thanks.

[Google]

[Clusterslaststand]

Even more..
Quartz's piezoelectric properties were discovered by Jacques and Pierre Curie in 1880. The quartz oscillator or resonator was first developed by Walter Guyton Cady in 1921 [1]. George Washington Pierce designed and patented quartz crystal oscillators in 1923 [2]. Warren Marrison created the first quartz oscillator clock based on the work of Cady and Pierce in 1927 [3].

Quartz crystals are rotary polar (see rotary polarization) and have the ability to rotate the plane of polarization of light passing through them. They are also highly piezoelectric, becoming polarized with a negative charge on one end and a positive charge on the other when subjected to pressure. They will vibrate if an alternating electric current is applied to them. This proves them to be highly important in commerce for making pressure gauges, oscillators, resonators and watches.