Chengdeite is very rare and new to the mineral world. It is named for Chengde County, China from where it was discovered in placer deposits in just the early 1990's. Since then it has been found as a trace mineral in chromite rich ultra-mafic igneous deposits. Color is black. Luster is metallic.
Specimens are opaque.
Cleavage is absent. Fracture is hackly. Streak is black. Associated Minerals include olivine , chromite and other ultra-mafic igneous minerals. Notable Occurrences are limited to the type locality at Luan River in Chengde County, China and just a few ultra-mafic igneous rock deposits.