PRESOLAR CIRCUMSTELLAR SILICATES HAVE BEEN POSITIVELY IDENTIFIED BY THEIR HIGHLY ANOMALOUS O ISOTOPIC COMPOSITIONS USING NANOSIMS [1] YET PRESOLAR INTERSTELLAR SILICATES HAVE ELUDED UNAMBIGUOUS DISCOVERY. GLASS WITH EMBEDDED METAL AND SULFIDES (GEMS) HAVE BEEN PROPOSED TO BE THESE INTERSTELLAR GRAINS [2]. GEMS AND PRESOLAR SILICATES MAY THEREFORE REPRESENT RELATED AND CONSECUTIVE STAGES IN THE LIFETIME OF COSMIC SILICATES. UNFORTUNATELY ISOTOPIC STUDIES OF BOTH PRESOLAR SILICATES AND GEMS HAVE BEEN LIMITED DUE TO THEIR SMALL SIZE (~250 NM ON AVERAGE) AND THE SIGNIFICANTLY HIGH BACKGROUND CONTRIBUTION FROM THE ISOTOPICALLY NORMAL GRAINS THAT DOMINATE SOLAR SYSTEM MATERIALS. FURTHERMORE WHILE PRESOLAR SILICATES HAVE BEEN IDENTIFIED IN BOTH METEORITES AND INTERPLANETARY DUST PARTICLES (IDPS) GEMS HAVE ONLY BEEN CONCLUSIVELY FOUND IN IDPS AND MUST FIRST BE ULTRAMICROTOMED AND IDENTIFIED BY TRANSMISSION ELECTRON MICROSCOPY (TEM). I HAVE BEGUN A THOROUGH ISOTOPIC STUDY OF PRESOLAR SILICATES AND GEMS WITH THE UNPARALLELED ANALYTICAL CAPABILITIES AFFORDED BY THE RECENTLY DEVELOPED CHICAGO INSTRUMENT FOR LASER IONIZATION (CHILI) IN ORDER TO REVEAL THE ANCESTRY OR LACK THEREOF BETWEEN THEM. IN SUPPORT OF THIS RESEARCH I HEREBY APPLY TO THE NASA EARTH AND SPACE SCIENCE FELLOWSHIP (NESSF) FOR THE PLANETARY SCIENCE DIVISION (PSD). IN STUDYING THE ISOTOPIC EVOLUTION OF THE EARLIEST AND MOST PRIMITIVE SOLIDS IN ORDER TO UNDERSTAND THEIR ORIGINS HISTORIES AND RELATIONSHIPS THIS PROJECT DIRECTLY ADDRESSES THE FOLLOWING PSD GOALS: EXPLORE AND OBSERVE THE OBJECTS IN THE SOLAR SYSTEM TO UNDERSTAND HOW THEY FORMED AND EVOLVE AND ADVANCE THE UNDERSTANDING OF HOW THE CHEMICAL AND PHYSICAL PROCESSES IN THE SOLAR SYSTEM OPERATE INTERACT AND EVOLVE.