What is sand?

Under Construction

Classification and designation of soils according to grain sizes (DIN EN ISO 14688-1)
Soil group Designation (Symbol) Grain size [mm] Icon Remarks
Very coarse soil Large boulder (LBo)
> 630
   
Boulder (Bo)
> 200 ... 630
> Head size
Cobble (Co)
> 63 ... 200
< Head size
> Chicken eggs
Coarse soil Gravel (Gr)  
> 2 ... 63
< Chicken eggs
> Match heads
Coarse gravel (CGr)
> 20 ... 63
< Chicken eggs
> Hazelnuts
Medium gravel (MGr)
> 6,3 ... 20
< Hazelnuts
> Peas
Fine gravel (FGr)
> 2 ... 6,3
< Peas
> Match heads
Sand (Sa)  
> 0,063 ... 2
< Match heads, but single grain still recognizable
Coarse sand (CSa)
> 0,63 ... 2
< Match heads
> Semolina
Medium sand (MSa)
> 0,2 ... 0,63
Some semolina
Fine sand (FSa)
> 0,063 ... 0,2
< Semolina, but single grain still recognizable
Fine soil Silt (Si)  
> 0,002 ... 0,063
Single grains not visible to the naked eye
Clay (Cl)  
< 0,002