Anturiens
Anturiens are a fictional mineral group described in speculative geology and worldbuilding. In the imagined planetary system of Antar, anturiens are crystalline silicates that form under high-temperature, high-pressure conditions in ultramafic rocks. They are noted for iridescent, multi-layered prisms and a vitreous to resinous luster, with color variation driven by trace elements.
Chemically they are silicate minerals enriched with transition metals. They show a relatively wide refractive range
Anturiens occur in deep crustal xenoliths and hydrothermal veins in the Antarian crust, typically in association
Ethically and economically important in the fiction setting, anturiens are valued as gemstone material and as
Anturiens were first described by geomorphologist Leora Taren in 2141 in the Antar region. The name derives