It should not be confused with opalization. Opalization -is the play of color of the opal, which changes, with the angle of observation. Not to be confused with opalescence Quartz Watches - are powered by batteries rather than a mechanical spring. The batteries send electronic impulses through a small bar of synthetic quartz which vibrates more than 32,000 times per second. These vibrations are then channeled through a series of gears and converted to one impulse per second.
Quartz watches are general more accurate than mechanical watches.
Quench Crackling -stones that are quenching crackled have been heated and then plunged into cold water. This procedure is done to produce cracks in synthetic stones so they'll look more natural. Sometimes oil or other liquids are forced into the cracks to imitate the fingerprint inclusions found in some natural stones. Not desirable in faceted rubies and sapphires. Where the included needles are too numerous, the stone becomes opaque and, when cut accordingly, can show a cat's-eye.