5, Showonuola Street, Ogba, Agege, Lagos State
A G Nissama Minerals Limited engage in mining, marketing and exportation of Precious Metals and Gemstones such as: Au Gold Dust, Rough Diamonds, Aquamarine, Tourmaline
1, Nyango Gyel Street, Bukuru lowcost, Bukuru, Jos East, Plateau State
Brumeto Stones are dealers in precious gems ranging from sapphires, tourmaline, topaz, zircon.
5, Elewi Road, Oyo East, Oyo State
Olomowewe Industries Limited specialize in the mining, exploration and trading of gemstones most especially tourmaline.