If glass is made of sand, why is it clear and not sandy coloured?

Scientific anwers only please, no guess work!If glass is made of sand, why is it clear and not sandy coloured?
It's mostly made of silica (SiO2) (that they call it silica glass) and pure silica is colorless like float glasses. other additives help silica to melt it in lower temperatures.If glass is made of sand, why is it clear and not sandy coloured?
It is not just sand that is used,Other things are added.
Glass is not made OF sand (i.e. it is not JUST sand) but it is made WITH sand. As to the clarity: think of the difference between snow and water. Snow is opaque, but water is transparent. The same is true of sand. Grains of sand are crystalline structures which refract and reflect light irregularly. If you took a single grain, you would notice that it is slight translucent, but when you put a whole beach-ful of grains together, it takes on the sandy tan color you note.





When the sand is melted, and allowed to cool in an amorphous rather than a crystalline structure (as in glass), it becomes transparent. Then, the addition of various minerals allows that transparent glass to be colored in various ways.
Glass is made from almost pure silica sand. Silica sand for glass manufacturing composed of at least 98% SiO2 and less than .06% Fe2O3. The chemical they add depend on what color they want.





Silica sand when melted at a very high temperature and suddenly cooled will form as a transparent material because it has no time to recryrtallize.
Sand is silica, and silca comes in many degrees of purity. Very pure silica, with some other additives, will produce clear glass. Working with silica in a hot glass plant involves actual recipes which are used to produce different ';colors'; of glass.
Glass is a fusion between a number of materials. Typically float glass, that is sheet glass and bottle glass, are both clear formulations. The formulation is usually silica sand, limestone dolomite and potash. To get clear glass the iron and impurity content must be low. Have a look through the side of a sheet of glass and you will see a green colour, this is the impurities most likely to be iron. The silica sand is no longer sand in its chemical format but a silicate of calcium, magnesium and potassium. Clarifyers are added like sodium sulphate and lead (lead crystal). So silica sand becomes a complex chemical mixture.