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Formula: Ni(CO3)
Anhydrous normal carbonate, calcite group, forms a series with
magnesite
Specific gravity: 3.71
Hardness: 4½ to 5
Streak: Green, yellow
Colour: Light green
Environments
Gaspéite is formed from the oxidation of nickel-rich rock (Webmin).
Localities
At the Otter Shoot Nickel Mine, Juan complex, Kambalda Nickel mines, Kambalda, Coolgardie Shire, Western Australia,
gaspéite occurs with crystalline millerite,
nickeline, annabergite,
gersdorffite and magnesite
(Dana).
At the Otway Ni deposit, Nullagine, East Pilbara Shire, Western Australia, gaspéite occurs with
pecoraite, magnesite,
siderite, chrysotile,
antigorite, magnetite,
millerite and polydymite
(HOM).
At the type locality, the New Jersey Zinc Exploration Co. trench, Mont-Albert, La Haute-Gaspésie RCM,
Gaspésie-Îles-de-la-Madeleine, Quebec, Canada, magnesian gaspéite is a
secondary mineral found as a light green, massive rock occurring in
a two-foot wide vein enclosed in a vari-coloured metamorphosed siliceous dolomite.
The vein consists of essentially pure magnesian gaspéite with minor amounts
of annabergite, magnesite and
dolomite. Enclosed in the magnesian
gaspéite is a small amount of serpentine and
chrome spinel. Well-formed crystals of
millerite, nickeline,
annabergite, gersdorffite and
magnesite are found outside the vein in the siliceous
dolomite
(AM 51.677-684). Other associated minerals include polydymite and
heazlewoodite
(HOM).
At the Nakauri mine, Shinshiro city, Aichi Prefecture, Japan, gaspéite is associated with
glaukosphaerite, mcguinnessite
and jamborite
(HOM).
At the Bon Accord Ni deposit, Barberton, Ehlanzeni District, Mpumalanga, South Africa, gaspéite is formed
possibly from alteration of a nickel-rich meteorite. Associated minerals include
liebenbergite, trevorite,
nickeloan ludwigite,
bunsenite, violarite,
millerite and nimite
(HOM).
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