Perfect gemstone crystals, such a the breathtaking amethyst crystals here, are the jewels of the mineral world. Many jewelry makers are in thrall to that beauty, so it’s not all that hard to find gemstone crystals set into earrings or pendants. (Some of those may be man-made material cut into the shapes of crystals, which shows you how popular crystal shapes have become.)
In addition, because of their color and perfection, for millennia metaphysical powers have been attributed to gemstone crystals. The mystic properties associated with gemstones have made them desirable for time out of mind. After all, we all want a little boost of power sometimes, and what better way to feel that power than to wear a beautiful stone?
A lot of crystal myth and legend is just that. But quartz (amethyst is a type of quartz) is an unusual stone with a number of superpowers. One of the most intriguing is that it’s piezoelectric. Applying pressure to the stone generates electricity and vice versa—applying electricity makes the stone vibrate.
The thickness of the stone affects the frequency at which it vibrates. In fact, during WWII, quartz crystals were an integral part of radios. Tons of crystals were cut into slices to enable communication. Quartz is used today in watches and clocks to ensure precision timing. The material used for this is man-made, or synthetic, quartz. It’s no longer natural quartz cut from mined quartz crystals.
When writing Dangerous Visions, I used this quartz super power by giving Stacie a quartz crystal to augment her Second Sight abilities. I took the liberty of including amethyst under the blanket of quartz’s “radio capabilities,” though to my knowledge, the impurities that give amethysts their color would probably make the stones useless for radio communication.
But that’s the fun of writing fiction.