What is Sand Made of? History. | Saltwater Science | Learn Science .Oct 22, 2013 . Just by looking at these samples, we can make some guesses about where they came from. The sand on the left has some black grains and a.what makes sand,Science of Summer: Where Does Beach Sand Come From?Jul 16, 2013 . Here's a look at the geological history of beach sand and why some beaches are covered in sand with a pink hue and others a green or black.
what makes sand