WHY SOME HIGH-GRADE DEPOSITS FAIL One of the most common misconceptions in mining is that a high-grade deposit automatically leads to a successful mining operation. In reality, many projects with attractive grades fail to deliver value—not because the grade was low, but because critical geological, mining, metallurgical, and economic factors were not fully understood or incorporated into the decision-making process. A resource model may look impressive on paper, but several factors can significantly impact the outcome: • Poor geological continuity • Incorrect geological domaining • Non-representative density data • Over-extrapolation beyond data support • Low metallurgical recovery • Excessive mining dilution • Geotechnical constraints • Hydrogeological challenges The journey from an exploration target to recovered metal is a continuous process of value conversion. At every stage, uncertainty must be managed, and assumptions must be tested against reality. This is why resource estimation should never be viewed as a standalone exercise. It is the foundation upon which mine planning, reserve conversion, production performance, and ultimately project economics are built. A valuable reminder for all geoscientists and mining professionals: > "The best resource is not the one with the highest grade, but the one that can be mined, processed, and sold profitably." What, in your experience, is the most underestimated factor that causes the gap between a resource model and actual mine performance? Discussion is always welcome. #Mining #Geology #ResourceEstimation #MineralResources #OreReserve #MiningEngineering #Geostatistics #ResourceGeology #MinePlanning #JORC #Exploration #MiningIndustry #Geoscience #Reconciliation