Jade is a name shared by two distinctly different minerals—Nephrite, a calcium magnesium silicate, and Jadeite, a sodium aluminum silicate. Nephrite has a hardness of 6 and Jadeite has a hardness of 6.5 to 7. Both have monoclinic crystal systems and are very tough stones, a trait caused by their finely interlocked and strongly bonded crystal structures.
Green Jade is a stone with a heart of healing, and a stone for healing the heart. Its energies are so strong and steady, one feels a flow of well-being and balance almost immediately upon touching them.