Both silicon and diamond are non-molecular materials, and each consists of tetrahedral carbon or silicon in a tetrahedral array. Because #Si-Si# bonds are longer than #C-C# bonds we would predict that less energy is required to disrupt them, and that therefore, the melting point of elemental silicon should be lower than that of diamond.
I hope it help you ans is
2) The are both found in nature, though SiO2 is more abundant
3) They are both very important industrially utilized materials
4) They both have high melting points (over 1500 K)
5) They are both relatively inert (stable to chemical reactivity)
6) They can both form clear uncolored crystals
7) They are both mined for extraction
8) They are both used ub optics applications
Diamond is essentialy carbon , Anything present other than Carbon is an contaminent. Silicon dioxide is SiO2. Anything is present is a contaminent.
Silicon dioxide is just that: SiO2. Anything else present is as a contaminant
diamond is essentially carbon and silicon is SiO2
don't bargain followers you can gain them by answering