Here is a listing of different types of inclusions that can affect the energy of quartz crystal.
Quartz crystal will look different in color due to the mix of other minerals in the original liquid. These affect the crystal’s frequency. In addition, mineral dealers will sometimes heat the crystal or layer other minerals on it, which affects its structure and use.
The major natural colors of quartz are:
Amethyst (purple, wisdom)
Aventurine (green, health)
Citrine (yellow, emotions)
Clear (most universal use)
Morion (black, entering the unknown)
Other colors (strawberry quartz, etc.) used variously as per its aspects
Mineral Occlusions – Asbestos, Chlorite (chlorite is used as a healing substance)
Rose Quartz (pink, heart & love)
Rutilated Quartz (strands of other substances, upping the power of the stone in its area)
Smokey Quartz (grey/brown, for relieving negative energies)
Tourmalinated Quartz (strands of black tourmaline, very powerful for dissipating negative energies)
Snow quartz (actually quartzite, softer type of quartz)
White Quartz (milky in look, bringing universal compassion into the crystal).