State/Location:
Cross River: Iyamoyong, Bebi, Ugbakkoko.      
Imo: Etite
Anambra: Oyi, Onitsha, Idemili North, Aniocha, Anambra.
Ebonyi: Abakaliki Centre, Abakaliki East, Ishielu,Ohaozara,
             Afikpo North, Oricha Afikpo South.
Abia: Nnochi
Osun: Iragbiji, Awo, Ile-Ife, Ila, Wasimi .
Ekiti: All over the northern part of the state.
Oyo: Found all over the state.
Ondo: (Charnockite) Idanre
Niger: Rafi, Kontagora
Gombe: Biliri, Balanga, Kaltungo, Shongon
Bauchi: Bauchi, Ganjuwa, Toro, T/Balewa, Shira
Yobe: Buni-Yadi (Gujba)
Adamawa: Yola, Numan
Taraba: Maisamari, Mambilla Plateau
Borno: Gwoza, area
Edo: Akoko Edo, Etsako East, Estako Central, Estako West, Owan East, 
       Owan West. 
Katsina: All Over the state
Kano: Rago, Garko
Osun: Iragbiji, Wasimi

Estimated Reserve ( Metric Tonnes):
Anambra: Large quantity.
Ebonyi: Very large quantity.
Osun: Not yet determined but large.
Ekiti: No valid reserve figure. 
Oyo:  No valid reserve figure.
Ondo: No valid reserve figure.
Edo: Not available 
Katsina: Not available
Kano: Not available
Oyo: Not available

Industrial Uses:
Used as decorating ornamental or facing stones in the industry also as raw materials for the steel, glass and refractory industries.

Process Technology/Equipment:  Not available

Investment Information Status and Prospects:
Cross River: An old , abandoned quarry.
Imo: Small scale exploitation. 
Ebonyi: Quarries exist in most of the location owned mainly by construction companies. and private rock crushing companies.
Osun: Quarries exist in most location.
Ekiti: "
Oyo: "
Ondo: " 
Edo: Recently, blocks are being exported for cutting and polishing.
Katsina: Partial exploitation. 
Kano: "
Oyo: "

R&D Activities:  Not available