mud - soil with mud, muck, or mire; The child mucked up his shirt while playing ball in the garden muck up, muck, mire begrime, bemire, colly, dirty, grime, soil - make soiled, filthy, or dirty; don't soil your clothes when you play outside!
Quartz is one of the most common minerals in the Earth's crust. It is made up of silicon dioxide (SiO2), otherwise known as silica. White sand is primarily made from quartz. Click here to find out more.
Composed of silicon and oxygen (silicon dioxide), Quartz, from the European quarz, is a key component in a wide array of minerals designated as silicates.. It occurs as prismatic hexagonal crystals in compact masses and druses, as well as in dense fibrous or grainy formations without visible crystals.