opal opal

Opal is a hydrated amorphous form of silica (SiO 2 · n H 2 O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. result opal togel Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. opal fruits slot