Here are the most popular crystals and their meanings as well as how to apply ... Citrine, like amethyst, is a type of quartz ...

X-ray analysis and scintillation crystals; and other types of crystals that are used in semiconductors. Optical crystals are used mainly in laser applications. For example, non-linear devices are used ...

Interestingly, both types of crystals are actually tasteless and ... Crystals will stick onto the cheese's surface, meaning ...