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.
Gems Formed in the Earthâs Mantle. 1  Magma pocket comes in contact with a weak area in crust. 2  A quick explosion results, carrying diamond-bearing magma to the surface. During the eruption, a cone builds on surface. 3  The pipe eventually cools, leaving carrot shaped pipe.