Agate gemstones .The Hardness of Agate is 6.5 - 7 and the chemical Composition is SiO2..~.. Metaphysically speaking the benefits of these stones have been known to be such things as transmitting less than positive energies, enabling a person to take an objective look at oneself. It also promotes regeneration and allows the person to explore beyond the knowledgeable boundaries of the astral planes..~..Physically it helps with tissue regeneration and rids the body of toxins…~.. Emotionally it eliminates lethargy and on occasion even depression