OnePlus 9 Pro has three color combinations, namely Oasis, Sparkling Silver and Black Hole. These three color combinations use different glass processes. Oasis is double-layer AG glass, Sparkling Silver is glossy glass, and Black Hole is silk glass. Different processes bring different touches, and the black hole version has the most unique touch. It looks frosted, but it is as smooth as silk and satin. It is no exaggeration to say that OnePlus is probably the most popular brand of glass in the mobile phone industry.