According to the Perceived Service Quality model (Figure 1), the quality of a service, as perceived by the customer, is the result of a comparison between the expectations of the customer and his or her real-life experiences.
Resorption of garnet I may have occurred either as a result of the prograde univariant reaction Grt + Chl + Ms = St + Bt + Qtz + H2O, or during decompression, by the net transfer reaction Grt + Ms + H2O = St + Bt + Qtz, before staurolite had become unstable.
Silica sinter generally seems to form in situations where hot silica-rich solutions get cooled very quickly. The cooling is too fast to allow the growth of large crystals or the formation of a silica gel that would be the precursor of chalcedony variants.