No images
Formula: Cu(CrV)S4
Sulphide, carrollite subgroup,
thiospinel group,
spinel supergroup,
chromium- and vanadium- bearing
mineral
Crystal system: Isometric
Specific gravity: 4.17 calculated
Hardness: 3½
Streak: Black
Colour: Black
Magnetism: Non-magnetic
Environments
Berndlehmannite is a new mineral, approved in 2024 and to date (September 2025) reported only from the
type locality.
Localities
At the type locality, the Zhongcun V deposit, Shanyang County, Shangluo, Shaanxi, China, berndlehmannite is
abundant in a phosphatic nodule-rich layer in the black shale hosted
deposit; it is commonly mineralogically associated with
roscoelite, quartz and
raspberry-like pyrite. Berndlehmannite exhibits a black colour in
hand specimens, with a black streak, and it comprises subhedral grains that vary in size from 20 to 120 μm. The
mineral is opaque with a cream-colored polished surface under reflected light
(AM 110.9.1446-1453).
Back to Minerals