| Minute crystals of brookite have been detected with anatase and rutile in the iron-ore of Cleveland in Yorkshire. |
| Brookite occurs only as crystals, never in compact masses, and is usually associated with either anatase or rutile. |
| In case low concentration of rutile phase is added to anatase phase, photocatalytic properties of titania increase. |
| Among the simple oxides, only anatase and hematite have been found to date. |
| Small well-developed brown anatase crystals replacing larger titanite crystals have been collected from Corral Canyon, Churchill County, Nevada. |
| Kyanite, garnet, monazite, and amphibole are common minerals, while apatite, anatase, titanite, corundum, pyroxene, and epidote are rare. |
