Otwayite
A variety of Minerals
What is Otwayite?
Otwayite, Ni2CO3(OH)2, is a hydrated nickel carbonate mineral. Otwayite is green, with a hardness of 4, a specific gravity of 3.4, and crystallises in the orthorhombic system.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Otwayite 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.
Otwayite Localities Map
See where Otwayite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Otwayite
Otwayite is found in association with nullaginite and hellyerite in the Otway nickel deposit. It is found in association with theoprastite, hellyerite, gaspeite and a suite of other nickel carbonate minerals in the Lord Brassey Mine, Tasmania. Otwayite is found in association with gaspeite, hellyerite and kambaldaite in the Widgie Townsite nickel gossan, Widgiemooltha, Western Australia. It is also reported from the Pafuri nickel deposit, South Africa. It was first described in 1977 from the Otway Nickel Deposit, Nullagine, Pilbara Craton, Western Australia and named for Australian prospector Charles Albert Otway (born 1922).
Quick Facts
Physical Properties
- Color
- Green, bright green
- Hardness (Mohs)
- 4
- Density
- 3.346 g/cm³
Chemical Properties
- Chemical Formula
- Ni2(CO3)(OH)2 · H2O
- Elements
- C, H, Ni, O
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Otwayite FAQs
How do I identify Otwayite?
Otwayite can be identified by its hardness of 4 on the Mohs scale, Green color. Look for these key characteristics when examining specimens.
What color is Otwayite?
Otwayite typically appears in Green, bright green. Color can vary depending on impurities and formation conditions.
How hard is Otwayite?
Otwayite has a hardness of 4 on the Mohs scale. This gives it moderate hardness.
What is the formation of otwayite of Otwayite?
Otwayite is found in association with nullaginite and hellyerite in the Otway nickel deposit. It is found in association with theoprastite, hellyerite, gaspeite and a suite of other nickel carbonate minerals in the Lord Brassey Mine, Tasmania. Otwayite is found in association with gaspeite, hellyerite and kambaldaite in the Widgie Townsite nickel gossan, Widgiemooltha, Western Australia. It is also reported from the Pafuri nickel deposit, South Africa. It was first described in 1977 from the Otway Nickel Deposit, Nullagine, Pilbara Craton, Western Australia and named for Australian prospector Charles Albert Otway (born 1922).
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