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  2. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

  3. Crystal oscillator - Wikipedia

    en.wikipedia.org/wiki/Crystal_oscillator

    A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. [1] [2] [3] The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers.

  4. Adularescence - Wikipedia

    en.wikipedia.org/wiki/Adularescence

    [3] [4] [5] Adularescence appears in numerous other gemstones, notably common opal, rose quartz and agate. However, due to inclusions in these other stones, the effect is displayed differently. The schiller is scattered by inclusions and appears hazy; non-hazy specimens are specially referred to as "milky".

  5. Piezoelectricity - Wikipedia

    en.wikipedia.org/wiki/Piezoelectricity

    A polymer does not have to be piezo-active to be an effective material for a polymer composite. [39] In this case, a material could be made up of an inert matrix with a separate piezo-active component. PVDF exhibits piezoelectricity several times greater than quartz. The piezo-response observed from PVDF is about 20–30 pC/N.

  6. Crystal healing - Wikipedia

    en.wikipedia.org/wiki/Crystal_healing

    An example of this is rose quartz. In Egypt, it was believed rose quartz could prevent aging, but the Romans used rose quartz as a seal to signify ownership, while in the Middle Ages it was used in healing potions, today rose quartz is known as the "love stone" and is used to balance emotions, and heal anger and disappointment. [17]

  7. Rose Quartz (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Rose_Quartz_(disambiguation)

    Rose quartz is a type of quartz which exhibits a pale pink to rose red hue. Rose Quartz may also refer to: Rose quartz (color), a gray shade of magenta; Rose Quartz (Fabergé egg) Rose Quartz (My Little Pony), one of the Crystal Ponies from the My Little Pony franchise "Rose Quartz", a song by Toro y Moi from their album Anything in Return ...

  8. Could Retirees See Social Security Benefits Cut Under Trump?

    www.aol.com/could-retirees-see-social-security...

    Social Security is the U.S. government's biggest program; as of June 30, 2024, about 67.9 million people, or one in five Americans, collected Social Security benefits. This year, we're seeing a...

  9. Luminescence dating - Wikipedia

    en.wikipedia.org/wiki/Luminescence_dating

    The natural minerals that are measured are usually either quartz or potassium feldspar sand-sized grains, or unseparated silt-sized grains. There are advantages and disadvantages to using each. For quartz, blue or green excitation wavelengths are normally used and the near ultra-violet emission is measured (Anti-Stokes shift). For potassium ...

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