4th chakra. Heart.  These are lovely tiny crystals of Demantoid Garnet, very energetic!  Moves energy through the heart chakra on a much deeper level than most heart based chakra stones.  I feel that this gemstone is wonderful for removing guilt that accumulates in our heart which can cause energy blocks. Cleanses the entire energetic system- very potent energy. These are very small crystals as much of the Demantiod is, I never see these in large crystals.  5-10 MM is the size, a bit smaller than a pea.