In fact, some of them are artificially dyed to enhance their appearance. This raises the question: does dyeing affect the crystal’s energy or spiritual properties? And is it bad to use dyed crystals ...

Chalcedonies include many types of cryptocrystalline quartz gems and feature a number of different colors. Geologists can tell a chalcedony from the arrangement and structure of its crystals.

By controlling the size of the particle, it can be made to emit or absorb specific wavelengths (colors) of light. Quantum dots are nanoscale man-made crystals that have the ability to convert a ...