Quest Rare Minerals Ltd. announced greatly improved production of a high purity rare earth and yttrium oxide concentrate from its new and substantially improved process flowsheet. The mixed rare earth oxide was produced as part of Quest's ongoing metallurgical testing program at SGS Mineral Services ­ Lakefield site (SGS), and represents the successful completion of the majority of the bench scale testing for the improved process. The analysis was confirmed by a highly reputed third party laboratory, Activation Laboratories Ltd. The mixed oxide contained 98.4% total rare earth oxide (TREO), of which approximately 37% is heavy rare earth oxide (HREO).