Basalt: extrusive igneous mafic rock; composed mostly of pyroxene, plagioclase feldspar & olivine; ferromagnesian minerals (olivine & pyroxene) are dark-colored minerals that contain a significant amount of iron and/or magnesium; less silicic than pyroclastic material from Mt. St. Helens ex: Hawaiian islands
Sunstone - Oregon state gem, is an interesting feldspar gemstone with a glittery appearance and usually an orange or reddish color, hence its name. The glitter effect is caused by inclusions of the mineral Hematite, or sometimes also Goethite or Pyrite (and in one rare instance, Copper). The term used to describe the glittery effect exhibited on Sunstone is aventurescence.