The article contains sections titled: 1. Introduction 2. Natural Abrasives 2.1. Quartz 2.2. Garnet 2.3. Corundum and Emery 2.4. Diamond 3. Manufactured Abrasives 3.1. Fused Aluminum Oxides 3.1.1. Raw Materials 3.1.2. Furnace Designs 3.1.3. Fused Alumina Types 3.2. Fused Zirconia ‐ Aluminas 3.3. Sintered Aluminas 3.4. Silicon Carbide 3.5. Boron Carbide 3.6. Diamond 3.7. Cubic Boron Nitride 4. Manufacture and Testing of Sized Grains 5. Physical and Chemical Properties 5.1. Hardness 5.2. Grain Strength or Fracture Toughness 5.3. Resistance to Attrition or Plastic Flow 6. Loose‐Grain Applications 7. Bonded Abrasive Products 7.1. Vitrified Bonds 7.2. Organic Bonds 7.3. Metal Bonds 8. Coated Abrasive Products 8.1. Components 8.2. Production 8.3. Applications 9. International Quality Specifications 10. Safety

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