Clusters from Peru Metaphysical Properties- Pyrite is another highly protective stone, blocking or shielding you from negative energies from people, places and things. Some like to use Pyrite to stimulate the intellect, recalling information when you need it the most. Good for those of us who can be forgetful. On the physical level, Pyrite can be used in the treatment and healing of all bone and cell diseases. A good protection against flu and the common cold. If you are a caregiver use the energies of pyrite to protect you from any harmful disease and germs associated with your work. Numerology- Vibrates to the number 3. Creativity and Joy! Gemological Properties-An Iron Sulfide (FeS2) which belongs to the Isometric or cubic crystal system. Found predominately in cubes, pyritohedrons, sometimes octahedral and more rarely, distorted octahedral crystals. It is also seen in the drusy formation and often as inclusions inside quartz. The hardness is around a 6.5 and the specific gravity is very heavy, 5.02. The refractive index is very high and over the limits of a refractometer. Iron Pyrite is a very abundant mineral found world wide.