Dude, when you cast molten metal into sand, you create glass micro balls. They are just starting from there. Sand is glass, heated to molten temperature and fused into a crystalline structure.
What is commonly understood as sand, has not much to do with little glass balls, even though here we have glass balls. A very special type of sand you can say, but not common "sand". But I feel no need to go more into pedantery here ... if this is sand to you, then I am fine with it.
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Same thing
Nope, just google for "sand microscope".
Dude, when you cast molten metal into sand, you create glass micro balls. They are just starting from there. Sand is glass, heated to molten temperature and fused into a crystalline structure.
What is commonly understood as sand, has not much to do with little glass balls, even though here we have glass balls. A very special type of sand you can say, but not common "sand". But I feel no need to go more into pedantery here ... if this is sand to you, then I am fine with it.