Mineralpedia Details for Brookite
Brookite
Named for Henry James Brook, an English crystallographer and mineralogist. An uncommon but widespread mineral that occurs as an accessory in alpine veins through gneiss and schist, in contact metamorphism zones, hydrothermal veinlets, and commonly as a detrital mineral. Localities for fine crystals of Brookite include in Wales, France, Switzerland, Austria, Norway, Russia, Italy, Brazil, and the United States, among several others. Associated minerals include anatase, rutile, titanite, orthoclase, quartz, hematite, calcite, chlorite, and muscovite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/brookite.pdf
- Formula
- TiO2
- Crystal System
- Orthorhombic
- Crystal Habit
- Tabular, Platy
- Cleavage
- Indistinct, None, None
- Luster
- Sub Metallic
- Color
- brown, light brown, dark brown, dark reddish brown, orange
- Streak
- yellowish white
- Class
- Orthorhombic - Dipyramidal
- Fracture
- Sub Conchoidal
- Hardness
- 5.5-6
- WebMineral
- View Brookite
- Mindat
- View Brookite
Brookite from Kharan dist., Baluchistan, Pakistan
Deep reddish brown, thin platy, perfectly formed crystals to 2cm perched atop a clear Quartz matrix.
Brookite from Magnet Cove, Hot Spring Co., Arkansas, United States
Rich and excellent specimen from this prolific and famous deposit with orthorhombic octahedral Brookite crystals from 3mm to 10mm
Brookite from Christy dep., Magnet Cove, Hot Spring Co., Arkansas, United States
Shiny black singles and groups of Brookite crystals to 5mm with Quartz.
Brookite from Intschi Tobel, Intschi, Reuss Valley, Uri, Switzerland
Sharp, brownish red bladed crystal to 7mm with adularia.
