Did you know?
Pressing a quartz crystal makes it give off a precise electric beat, which is why it keeps time in nearly every watch and once tuned the radios of World War II, when good crystals were a strategic resource.
The popular green stone called aventurine is really quartz packed with tiny flakes of fuchsite. Those flakes catch the light and give the stone its soft green glitter, an effect jewelers call aventurescence. So a good deal of the fuchsite people own is hidden inside something sold under another name.
