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A preliminary estimate of the reserve of the marble deposit in Itobe area, central Nigeria was determined from both outcrop geological mapping and geophysical resistivity surveying. Two outcrops (designated as mass I and mass II) of the marble deposit occurring about 850 m apart along a NE–SW axis were identified. The areal extent, thickness and density of the marble have been used in computing the reserve of the marble deposit. The reserve of mass I is estimated at 1418.4 tons and that of mass II has been estimated at 142643.2 tons. The total reserve of the marble deposit is 144061.6 tons.