Post-diamond mining mineral soils generally exhibit low fertility due to previous mining activities. This condition is characterized by acidic to slightly acidic soil pH and chemical properties dominated by sand and clay fractions. This study aimed to determine the effectiveness of agricultural lime, compost and these combination in improving the chemical properties of post-diamond mining soils. The experiment was arranged in a two-factor completely randomized design, consisting of agricultural lime treatments at rates of 2.5 and 5 t ha^-1 and commercial compost treatments at rates 7.5 and 15 t ha^-1. Data analyzed using the Least Significant Difference (LSD) test at the 5% level. The result showed, the combination of agricultural lime and compost was more effective in increasing soil pH compared to the single application of either treatment. Compost application without combination significantly affected available P and soil organic C content. However, all treatments showed no significant effect on CEC and soluble Fe.