Olivine is the typical color of the mineral olivine. Ida's regolith is composed of the silicate minerals olivine and pyroxene. Phenocrysts in Hekla's lava can contain plagioclase, pyroxene, titanomagnetite, olivine, and apatite. The upper mantle of Earth is composed mainly of olivine and pyroxene. Phenocrysts include augite, labradorite, olivine and plagioclase; additionally spinels are found in the rocks. With prograde metamorphism cummingtonite and grunerite morph to members of the olivine and pyroxene series. Alkali basalts typically have mineral assemblages that lack orthopyroxene but contain olivine. Minerals of this type include olivine and pyroxene, which are found in CM chondrules. Layered peridotites are igneous sediments and form by mechanical accumulation of dense olivine crystals. The researchers found concentrations of olivine and pyroxene in the "Hayabusa" samples. The Columbia Hills' rocks contain basaltic glass, along with varying amounts of olivine and sulfates. Wishstone contained a great deal of plagioclase, some olivine, and anhydrate (a sulfate). They are composed of either tholeiitic olivine or picritic basalt. The mafic mineral in Proterozoic anorthosite may be clinopyroxene, orthopyroxene, olivine, or, more rarely, amphibole. The word "peridotite" comes from the gemstone peridot, which consists of pale green olivine.