how is garnet crushed,Glass Bead Blasting vs. Garnet Sand Blasting - - Pro Blast TechnologyBlasting with garnet is another environmentally-friendly alternative to coal slag and other blasting medias. Garnet comes in a variety of sizes and is made from crushed Almandite or Andradite deposits. It can either come with rough edges or can be tumbled for more rounded edges. It rates a 7 to 8 on the Mohs scale.how is garnet crushed,Garnet: a mineral, a gem, an abrasive, a filter and more! - GeologyGarnet abrasive: This photo shows garnet granules that have been crushed and size-graded for use as abrasive, cutting, and filter media. They are used in waterjet cutting, "sand" blasting, sandpaper, water filtration, and a number of other uses. Almandine is the hardest garnet and also the most abundant. It is the garnet of.