what is sand made up of
What is sand made of. Sand is usually composed of mineral grains. Youâll find a post about the sand-forming minerals here. Sand itself is not a mineral. It is a sediment just like clay, gravel and silt.Most common sand-forming mineral is quartz. There are two good reasons for that.First, quartz is very important rock-forming mineral.and is usually composed of mineral grains. Youâll find a post about the sand-forming minerals here. Sand itself is not a mineral. It is a sediment just like clay, gravel and silt. Most common sand-forming mineral is quartz. There are two good reasons for that. First, quartz is very important rock-forming mineral.