sand

[leeb]

how is sand made?

[HWKE]

Sand is not a material as such, but is a grain size on the scale of geologic materials. The scale goes essentially like this...clay,silt, sand, gravel, cobble, boulder.
Any rock/mineral that is reduced to this size is "sand". They come mostly from rocks and shells.
Silicates form the most common sands.
Feldspars and micas will continue to get smaller and form silts and even finer clays. In all cases, they are mostly the product of physical and chemical erosion...rock/shell particles being ground down by abrasion, collision, etc., or contact with acids (acid rain) and so on.

[jules77]

you would be better in a different category - and its all according what sort of sand you mean - stuff on the beach is made of shell fragments, or if you go to Tenerife from ash and in some areas from lava - or do you mean building sand?

[wildwood]

Sorry, but I disagree jules77. I really think that this is the ideal category for sand. All types of sand is the result nature's corrosion as so aptly described by HKWE