Iolite. A silicate of alumina, iron and magnesia, having a bright blue color and a vitreous or glassy luster. It is remarkable for its dichroism, and is also called dichroite.
“But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self–control. Against such things there is no law.”
– Galatians 5:22-23