Stimulates Kundalini energy, cleanses and protects the astral field, draws out distortion on all levels, good for hyperactivity and excess energy, helps to relieve depression and also helps us to manifest our dreams...settling, calming. A wonderful stone to use for grounding and centering. This stone can also be used to help overcome sadness and other negative emotions. It is also an excellent mood elevator.

also smoky quartz is good for men as moonstones are for women. Although i don`t think it brings out too much masculine aspects though.

Irradiated quartz is another quartz which is black. That one helps with cleansing the environment of negitive energy. Also i believe it helps neutralize the radiation effect from television. I`m not sure on the last one though. But this was the first type of stone i ever collected about 20 years ago