Trevorite
A variety of Minerals
What is Trevorite?
Trevorite is a rare nickel iron oxide mineral belonging to the spinel group. It has the chemical formula NiFe2O4. It is a black mineral with the typical spinel properties of crystallising in the cubic system, black streaked, infusible and insoluble in most acids. There is at least partial solid solution between trevorite and magnetite, with many magnetites from ultramafic rocks containing at least trace amounts of Ni. Fe and Mg may substitute for Ni in trevorite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Trevorite 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.
Trevorite Localities Map
See where Trevorite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Trevorite
It was first described for an occurrence in the Bon Accord Nickel Deposit, Bon Accord, Barberton, Mpumalanga, South Africa, in 1921 and was named for Major Tudor Gryffydd Trevor (1865–1954) who was a mining inspector in South Africa. In the Bon Accord deposit it occurred as a contact deposit between an ultramafic intrusion and a quartzite. In an occurrence at Mount Clifford, Australia, it occurs associated with a nickel sulfide orebody adjacent to a gabbro which intruded peridotite. Associated minerals include nimite, willemseite, nickeloan talc, violarite, millerite, reevesite and goethite at Bon Accord; and with native nickel, heazlewoodite and millerite at Mt. Clifford. It has also been reported from the Logatchev-1 hydrothermal field on the Mid-Atlantic Ridge; in the Hatrurim Formation in the Negev Desert in Israel; the Josephine Creek District, Josephine County, Oregon and the Gabbs District of Nye County, Nevada.
Quick Facts
Physical Properties
- Color
- Black with green or brown tint
- Hardness (Mohs)
- 5
- Density
- 5.2 g/cm³
- Streak
- Light brown
Chemical Properties
- Chemical Formula
- Ni2+Fe3+2O4
- Elements
- Fe, Ni, O
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Trevorite FAQs
How do I identify Trevorite?
Trevorite can be identified by its hardness of 5 on the Mohs scale, Black with green or brown tint color. Look for these key characteristics when examining specimens.
What color is Trevorite?
Trevorite typically appears in Black with green or brown tint. Color can vary depending on impurities and formation conditions.
How hard is Trevorite?
Trevorite has a hardness of 5 on the Mohs scale. This gives it moderate hardness.
What is the formation of trevorite of Trevorite?
It was first described for an occurrence in the Bon Accord Nickel Deposit, Bon Accord, Barberton, Mpumalanga, South Africa, in 1921 and was named for Major Tudor Gryffydd Trevor (1865–1954) who was a mining inspector in South Africa. In the Bon Accord deposit it occurred as a contact deposit between an ultramafic intrusion and a quartzite. In an occurrence at Mount Clifford, Australia, it occurs associated with a nickel sulfide orebody adjacent to a gabbro which intruded peridotite. Associated minerals include nimite, willemseite, nickeloan talc, violarite, millerite, reevesite and goethite at Bon Accord; and with native nickel, heazlewoodite and millerite at Mt. Clifford. It has also been reported from the Logatchev-1 hydrothermal field on the Mid-Atlantic Ridge; in the Hatrurim Formation in the Negev Desert in Israel; the Josephine Creek District, Josephine County, Oregon and the Gabbs District of Nye County, Nevada.
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