Accessory phases include titanite, apatite, corundum, zircon, magnetite and ilmenite. Zircon, apatite, titanite, magnetite, ilmenite, and sulfides occur as accessory minerals. The accessory minerals are magnetite, ilmenite, apatite, and titanite. Associate minerals include epidote, titanite, glaucophane, garnet and quartz. Other common accessory minerals are apatite, titanite, zircon and opaques. La Torta also has phenocrysts of sanidine and additional apatite and titanite. The mottled anorthosite is composed of traces of quartz, titanite and apatite minerals. Less alkaline igneous rocks in which zircon, titanite, and ilmenite are characteristic are called miaskitic. Common titanium-containing minerals are anatase, brookite, ilmenite, perovskite, rutile, and titanite (sphene). While with SEM-EDS, titanite, apatite, and baddeleyite were also observed. Khomyakovite itself is associated with analcime, annite, natrolite, titanite, calcite, and pyrite. Titanite can also be used as a U-Pb geochronometer, specifically in metamorphic terranes. Sphene persists as the informal name for titanite gemstones. Well-developed titanite crystals of unusual size are found in the contact zone. It is a member of the titanite group.