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The phase transition between a low-temperature trigonal form (space group P3121 or P3221) and a high-temperature hexagonal one (space group P6422 or P6222) of stuffed derivatives of quartz crystallized from glasses of the Li2O-Al2O3-SiO2 system was determined by micro-Raman spectroscopy. This method enables local (mm scale) assignment of the high-/low-type of quartz crystal and an indirect determination of their chemical composition (degree of stuffing) from the position and intensity of characteristic bands close to 110, 355 and 460 cm-1. Raman spectra were presented in a wide range of compositions ranging from 100–50 mol% SiO2.