About Us : Cornerstone Ltd. supplier of Saprolite Nickel Ore / Laterite Nickel Ore 1.8% up to 2.0% UP Export License (ET) Completed & Quota 300K WMT per Month Contact Person : Mr. Odisi Sarjana Mobile : +62 878 5437 5827 Telephone : (62-31) 6020-7772 Facsimile : (62-31) 5044-767 .