Anorthosite
Videos
Anorthosite is a phaneritic, intrusive igneous rock characterized by its composition: mostly plagioclase feldspar, with a minimal mafic component. Pyroxene, ilmenite, magnetite, and olivine are the ma
Anorthosite from Salem district, Tamil Nadu, India
Nain Anorthosite, a mid-Mesoproterozoic intrusion (1.29 to 1.35 billion years), Labrador. Polished slab; blue color is labradorescence.
Anorthosite from southern Finland
Anorthosite from Poland
Labradorite
Videos
Labradorite is a calcium-enriched feldspar mineral first identified in Labrador, Canada, which can display an iridescent effect.
Labradorite in a polished rock slab
Spectrolite with purple, pink, and orange iridescence
Polished block from Madagascar
Detail of labradorite