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.
About Snowflake Obsidian. Snowflake Obsidian is both an igneous rock and a natural glass. This rock-glass is formed when lava cools with incredible rapidity and minimum crystallization. When this occurs, the lava gradually transforms into a black glass.nowflake Obsidian is both an igneous rock and a natural glass. This rock-glass is formed when lava cools with incredible rapidity and minimum crystallization.