Cabrerite is an arsenate mineral bearing magnesium and nickel.
It is a member of the hörnesite-annabergite series in the vivianite group.
The name Cabrerite has been in use for any annabergite with notable incorporation of magnesium, typically nickel remaining the dominant ion.
[2] It was specified to refer to specimens with a Ni:Mg ratio of 1:2 in 2024.
[1] This article about a specific mineral or mineraloid is a stub.