Hydrated silica is an inorganic material.
Diatoms are algae, diatoms are protists. Diatoms are placed in the division Bacilliariophyta, which is distinguished by the presence of an inorganic cell wall composed of hydrated silica.
it is made of silica and is inorganic
It is inorganic (does not contain carbon).
yes
inorganic, as it is hydrated ferric oxide
Opal ia a hydrated silica mineral.
No. Opal is an amorphous hydrated form of silica.
Yes, which is why it reacts so little with the human body.
Silica IS a compound - silicon dioxide. Perhaps you mean silicates? silicones? other silicon compounds?
mSiO2.nH2O m=n=1,2,3 or 4
That is the correct spelling of "opal" (semi-precious stone, hydrated silica).
Opal is a form of silica, amorphous and hydrated: SiO2.nH2O.