These are quartz crystals and feldspar, so most sand in the world on the mainland is made of quartz crystal and feldspar. It's the erosion of granite rock.

These are quartz crystals and feldspar, so most sand in the world on the mainland is made of quartz crystal and feldspar.

The crowning glory of the pendant is a faceted pear shaped smoky quartz gem whose muted hues evoke the inspired images of morning mist blanketing the forest

Magnificently crafted in silver the Sylvan Set portrays a vintage style set consisting of a pendant and earrings

Human Firewall Technology uses quartz to absorb harmful frequencies and then the frequencies emit back in a neutralised wave form.

While a quartz watch keeps time more accurately than the most finely crafted handmade mechanical Swiss watch, the value of a quartz watch has plummeted, while Swiss watches value has climbed into the stratosphere.

Furthermore, Saki poses unique therapeutic mud and Eupatoria has vast empty beaches with the purest sand.

The pattern of the circuitry for each chip is contained in a pattern etched in chrome on the reticle, which is a plate of transparent quartz.

This modern clock relied on the swing of a pendulum or the vibration of a quartz crystal, which was far more accurate than sand or candles.

Therefore, it's no surprise that it would also be home to the most pure quartz crystal in the world, capable of increasing and harmonising energy levels.

Quartz glass, which is common in cuvettes, can withstand high temperatures and is transparent in certain parts of the electromagnetic spectrum.

The National Bureau of Standards (now NIST) based the time standard of the United States on quartz clocks from late 1929 until the 1960s, when it changed to atomic clocks.

There are many furrows in the sand where some creature has travelled about and doubled on its tracks and, for wrecks, it is strewn with the cases of caddis worms made of minute grains of white quartz.

Germanium differs from silicon in that the supply for germanium is limited by the availability of exploitable sources, while the supply of silicon is only limited by production capacity since silicon comes from ordinary sand or quartz.

In addition, the quartz watches also have integrated alarm, stopwatch, and timer functions that the other watches either lack, or that serve only as a design spoiling, hard to read effort to keep up with the competition.