Investigation of the Mineral Content of Laterite Soil and Nickel Ore in the Nickel Mining Area of PT Vendoura Inti Perkasa, Bahodopi District, Morowali Regency W. S. Nurjannah, L. Agusu, R. Eso International Journal of Acta Material Vol. 2 No. 2 2026 DOI 10.62749/ijactmat.v2i2.25