Garnet Sand, Garnet Grain & Garnet Powder


A group of iron aluminum silicate homogeneous mineral has similar properties. Non-hygroscopic, sharp angular shape, inert, slightly magnetic, not soluble in water, translucent, friable to tough, and contains no free chemicals. All oxides and dioxides are combined chemically as follows: Fe2O3Al2 (SiO4)3. The iron and aluminum are partially replaceable by calcium, magnesium and manganese. There are three types- aluminum garnet, iron garnet & chromium garnet.

PreRish Tri is specialized in manufacturing industrial grade Garnet Sand / Garnet Granules up to the mark of customer’s satisfaction. We Export Garnet Lumps direct from our Mines to anywhere in the world.

Chemical Formula:  Fe3Al2 (SiO4)3


Iron aluminum silicate, garnet sand, garnet grain, garnet powder, garnet grit, almandite garnet, garnet grain, iron aluminum silicate, Fe3Al2(SiO4)3, iron aluminum silicate, CAS# 1302-62-1, calcium silicate, aluminum silicates, sands, inorganic abrasives, coast guard grade 36CG

Chemical Properties:

SiO2= 41.34%        FeO= 9.72%     Fe2O3= 12.55%           Al2O3= 20.36%           CaO= 2.97% MgO= 12.35%        MnO= 0.85%

Physical Properties:

  1. Sintered pieces, targets, granules and various powder sizing
  2. Grade 36CG (For Coast Guard marine deck abrasive paint applications)

Typical Applications:

  • Used in non-skid surfaces and heavily as a semi-precious stone
  • Garnet sand is a good abrasive and a common replacement for silica sand in sand blasting. Alluvial garnet grains which are rounder are more suitable for such blasting treatments. Mixed with very high pressure water, garnet is used to cut steel and other materials in water jets. For water jet cutting, garnet extracted from hard rock is suitable since it is more angular in form, therefore more efficient in cutting.
  • Garnet paper is favored by cabinetmakers for finishing bare wood.
  • Garnet sand is also used for water filtration media.
  • As an abrasive, garnet can be broadly divided in two categories, blasting grade and water jet grade. The garnet, as it is mined and collected, is crushed to finer grains; all pieces which are larger than 60 mesh (250 micrometers) are normally used for sand blasting. The pieces between 60 meshes (250 micrometers) and 200 mesh (74 micrometers) are normally used for water jet cutting. The remaining garnet pieces that are finer than 200 mesh (74 micrometers) are used for glass polishing and lapping. Regardless of the application, the larger grain sizes are used for faster work and the smaller ones are used for finer finishes.


FractureSubconchoidal, usually brittle
ColorRed to pink
Bulk Density (lbs./ft3)150.
Melting Point (°C)1250 to 1315
Fusion Point (high Fe) (°C)1200
StrengthFriable to Tough
Mineral Conductivity (volts)18,000
Mohs Hardness @20°C~ 8 to 9
Specific Gravity3.9- 4.1
Mean Refractive Index1.74- 1.89
Facet Angles37oC and 42Op