Copper

Copper minerals occur in the Umpyrtha and Ranighat areas in the Khasi and Jaintia hills and also in the Mahamaya hills in Goalpara district.

Felspar

Felspar is a common mineral found to occur in association with granites. Recently workable felspar deposits have been recorded near the Hahim area in Kamrup district.

Gold

Gold is reported to occur in sands, gravels and alluvial terraces along some of the rivers in the Lakhimpur, Sibsagar and Darrang districts of Assam. A gold-bearing rock was located at a place about 5 miles southwest of Mawphlang.

Gypsum
Gypsum in the form of selenite crystals and disseminated in shale beds occur at Mahendraganj in the Garo hills and at a few places in the Mikir hills.