Crystals have fascinated humans since antiquity. Back before glass or dyes, brightly-colored, shiny rocks held a particular fascination for humans. Some became gemstones purely for decoration. However, any crystal channel healing or magick energy.
Crystals are conduits of cosmic and psychic energy.
I like to leave a few crystals by my table when I work. I use a clear quartz to channel energy, a rose quartz to increase love, and an amethyst to open the channels to the cosmic world. I also like to use fluorite and tanzanite to open my third eye. I like lapis lazuli, too. They look nice and the colors are soothing, but more importantly, the minerals themselves help me channel energy from the universe toward myself so I can better help others.
Use a crystal to channel energy toward or away.
Crystals can bring energy toward you or away from you. This is useful for physical healing. Turquoise, serpentine, quartz, and citrine are great for protection and drawing in energy. Hematite and obsidian is great for repelling it. Generally speaking, darker gemstones draw energy away from the body and lighter gemstones attract it. When it doubt, quartz and green crystals are great for drawing healing energy toward the body.
Crystal visions are a real thing
“Look into my crystal ball,” the psychic says, as he or she gazes into the shiny sphere waiting for a vision to come. Nowadays, most balls are made of glass, but they used to be made of crystal. They were smaller back then, and not all of them were clear. Any shiny crystal would do. My mother preferred an obsidian ball. My great-grandmother was known for her labradorite sphere visions.
I’ll tell you a secret: the crystal ball channels energy into the mind, but once in a great while, a vision actually appears in the crystal itself. This is usually because the energy is so strong that it can appear in 2-D.