These rhodonite crystals are a slightly smaller sized stone. They're classed as grade B because they're heavily included. Black inclusions caused by manganese oxides are relatively common in the mineral rhodonite. When many but not all minerals are graded inclusions are taken into consideration.
Inclusions in rhodonite often occur as dendrites. These are crystals with a branching form so can look similar to organic matter. The word 'dendrite' comes from the Greek 'dendron' meaning 'tree'.
The inclusions can also occur as veins or fracture fillings in the mineral or even be part of the matrix. Matrix is the host rock or material in which the rhodonite forms.
As well as being widely used for decorative purposes, rhodonite crystals are also used for their metaphysical properties. Associated with the heart chakra, the energy of rhodonite focuses on love and compassion. It calms anxiety, boosts confidence and promotes truth and happiness.