Pseudobrookite
A variety of Minerals
What is Pseudobrookite?
Pseudobrookite is a sleek mineral that occurs in metallic shades of brown and black and can be found in spiny urchin-like formations. This mineral is often mistaken for brookite, which its name implies. Pseudobrookite was discovered in 1878 in Romania and has since been found in several other countries that have young volcanic rocks.
Uses & Applications
Pseudobrookite is an ore of titanium and has shown the potential as a source for ceramic pigments. However, pseudobrookite is a rare mineral, and specimens often end up in collections rather than being put to any use.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Pseudobrookite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Pseudobrookite Localities Map
See where Pseudobrookite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Pseudobrookite
Pseudobrookite was first described in 1878 for an occurrence in Uroi Hill (Arany Hill), Simeria, Hunedoara County, Romania. The name is from Greek ψευδής, for false, and brookite because of its misleading similar appearance to brookite. Pseudobrookite forms as pneumatolytic deposition and alteration within titanium-rich volcanic rocks such as andesite, rhyolite or basalt. It may be associated with xenoliths contained in the volcanics. It also commonly occurs in lithophysae. It occurs associated with hematite, magnetite, bixbyite, ilmenite, enstatite-ferrosilite, tridymite, quartz, sanidine, topaz, spessartine, beryl, mica, cassiterite and apatite. Occurrences include: Mayen in the Eifel district, Germany Mont Dore, Puy-de-Dome, France Vesuvius, Italy Jumilla, Murcia Province, Spain Faial and São Miguel Islands, Azores Kilimanjaro, Tanzania; Reunion Island the Thomas Range, Juab County, Utah Crater Lake and Lemolo Lake, Oregon the Black Range, Sierra County, New Mexico Cerro los Remedios, Durango, Mexico
Quick Facts
Physical Properties
- Color
- Brownish black, reddish brown, black
- Hardness (Mohs)
- 6
- Density
- 4.39 g/cm³
- Streak
- Brown
- Luster
- Greasy, Metallic, Adamantine
- Crystal System
- Orthorhombic
Chemical Properties
- Chemical Formula
- Fe2TiO5
- Elements
- Fe, O, Ti
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Pseudobrookite FAQs
How do I identify Pseudobrookite?
Pseudobrookite can be identified by its hardness of 6 on the Mohs scale, Brownish black color, Greasy, Metallic, Adamantine luster, Orthorhombic crystal system. Look for these key characteristics when examining specimens.
What color is Pseudobrookite?
Pseudobrookite typically appears in Brownish black, reddish brown, black. Color can vary depending on impurities and formation conditions.
How hard is Pseudobrookite?
Pseudobrookite has a hardness of 6 on the Mohs scale. This gives it moderate hardness.
What is the formation of pseudobrookite of Pseudobrookite?
Pseudobrookite was first described in 1878 for an occurrence in Uroi Hill (Arany Hill), Simeria, Hunedoara County, Romania. The name is from Greek ψευδής, for false, and brookite because of its misleading similar appearance to brookite. Pseudobrookite forms as pneumatolytic deposition and alteration within titanium-rich volcanic rocks such as andesite, rhyolite or basalt. It may be associated with xenoliths contained in the volcanics. It also commonly occurs in lithophysae. It occurs associated with hematite, magnetite, bixbyite, ilmenite, enstatite-ferrosilite, tridymite, quartz, sanidine, topaz, spessartine, beryl, mica, cassiterite and apatite. Occurrences include: Mayen in the Eifel district, Germany Mont Dore, Puy-de-Dome, France Vesuvius, Italy Jumilla, Murcia Province, Spain Faial and São Miguel Islands, Azores Kilimanjaro, Tanzania; Reunion Island the Thomas Range, Juab County, Utah Crater Lake and Lemolo Lake, Oregon the Black Range, Sierra County, New Mexico Cerro los Remedios, Durango, Mexico
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