Heavy Minerals (ASX:HVY) has announced the updated Mineral Resources Estimate for the Port Gregory Garnet Project of 166 Mt @ 4.0% which represents an increased tonnage of material by 23%.

The company said the completed Estimate includes 5.9Mt of contained garnet, representing about five years of current global demand. 

It also said majority of the Mineral Resource (71% of contained garnet) is in the Measured JORC category. 

Heavy Minerals added that work is to commence on pit optimisation and mine planning to produce mining inventory to feed into the upcoming Pre-Feasibility Study for Port Gregory.