I just checked up in my Crystal "Bible" on Smoky Quartz, and here's what I found on it:

Smoky Quartz is one of the most effecient grounding and anchoring stones and at the same time raises vibrations during meditation. This protective stone has a strong link with the Earth and the base chakras, promoting a concern for the environment and ecological solutions. This stone is a superb antidote to stress. It assists in tolerating difficult times with equanimaity , fortifying resolve.

Grounding spiritual energy and gently neutralizing negative vibrations, Smoky Quartz blocks geopathic stress, absorbs electromagnetic smog and assists elimination and detoxification on all levels. It brings in a positive vibration to fill the space. Smoky Quartz teaches you how to leave behind anything that no longer serves you...........

(OMG, that applies to that boyfriend that took off after holding it!..lol! wowww!!)

Physically, because Smoky Quartz is often naturally irradiated, it is excellent for treating radiation related illness or chemotherapy. However, care should be taken to select naturally formed stones with minuscule radiation rather than ones that have been artificially treated with radiation (these stones are usually very black and nontransparent compared to the natural radiated Smoky quartz). Tolerance of stress is much improved with the assistance of relaxing Smoky Quartz and this stone provides pain relief. In healing, a layout of slow release Smoky Quartz pointing out from the body can prevent a healing crisis from occuring....."


From The Crystal Bible: A Definitive Guide to Crystals by Judy Hall.