The realization that color has influence over the human mind is as old as
recorded history. What is hard is to separate out the fact from the fiction. Colors have many meanings to people mostly based on their culture and religion. But the natural crystals and minerals have no culture and no religion. They are a part of the Earth.
Their color influence rays stay the same. We see “red” when mad, and red inspires us to action. We are “blue” when sad. Yellow warms us. Green slows us down both mentally and physically. The fundamental meanings of colors have been present in the wisdom of all cultures, but somewhat confusing and occasionally misinterpreted. But with the research of today’s practitioners of biology, biochemistry, and physics, we can sort truth from fiction.