Images
Formula: Ca[AlFe3+11]O19
Oxide, hibonite subgroup of the
magnetoplumbite group
Crystal System: Hexagonal
Specific gravity: 5.36 calculated
Hardness: 5 to 6
Streak: Black, occasionally displaying a brown tint
Colour: Black
Environments
Gorerite is a relatively new mineral, aproved in 2019.
Localities
At the type locality, the "Olive unit", Hatrurim Basin, Tamar Regional Council, Southern District, Israel,
gorerite was found in ferrite-rich segregations of
esseneite – gehlenite –
wollastonite – anorthite melted
rock. Within these ferrite-rich segregations up to 100 μm in size, platy crystals
of gorerite up to 50 μm in size intergrow with hibonite,
hematite, maghemite,
magnesioferrite, dorrite,
barioferrite and andradite,
forming aggregates. Additionally, small crystals of gorerite occur within
magnesioferrite. Importantly, gorerite did not crystallise
directly from the melt. Instead, it emerged through a reaction involving earlier crystallised
hibonite and an iron-enriched melt,
resulting in the partial or complete replacement of hibonite by
gorerite
(MM 88.4.).
Back to Minerals