The requirements referred to in "Abrasive materials" are met in different ways by the abrasives available. The main features of abrasive materials are as follows:

Cubic boron nitride (CBN)
very hard, highly resistant, high-performance

Diamond
extremely hard, highly pressure-resistant, heat-sensitive

Silicon carbide (SiC) dark
tough, chips somewhat block-like, pressure-resistant, high-performance

Silicon carbide (SiC) green
less tough, chips very readily, high-performance

Sintered corundum (Sol Gel)
chips extremely readily under pressure, high-performance

Regular corundum (Al₂O₃)
hard and tough, pressure-resistant, chips block-like (grained)

Semi pure corundum (Al₂O₃)
hard, but less tough than regular corundum, chips sharply

Pure corundum white(Al₂O₃)
hard and brittle, chips sharply and randomly

Pure corundum pink (Al₂O₃)
very hard, brittle, resistant to edge tear and impact, chips sharply

Pure corundum ruby (Al₂O₃)
very hard, resistant to edge tear and impact, chips sharply

Monocrystalline corundum (Al₂O₃)
very hard, tougher than white aluminium oxide, chips block-like to sharply