Gaspeite
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Gaspéite, a very rare nickel carbonate mineral, with the formula CO₃, is named for the place it was first described, in the Gaspé Peninsula, Québec, Canada.
Gaspéite is the nickel rich member of the calcite group. Wikipedia
Crystal class: Hexagonal scalenohedral (3m); H-M symbol: (3 2/m)
Crystal habit: Rhombic crystal aggregates, nodular concretions (botryoidal), massive
Crystal system: Trigonal
Other characteristics: Weakly magnetic