MN620 Sample ID MN620 • Cabinet Z Feldspar with Adularia and Quartz Inclusions 11cm W x 4cm H x 5.5cm D • 308g Sample TypeMineralColorWhite with yellowish to Dark green crystals.LusterVitreous StreakWhiteCleavage/FractureUneven Cleavage and Brittle FractureSpecific Gravity2.8 Geographic Location/DateBrimfield MA Mohs Hardness 6 A feldspar matrix with Adularia and Quartz inclusions. Reclassified from Adularia to Feldspar due to composition. Contains Light and Dark green quartz crystals sprinkled throughout specimen. Has uneven cleavage and brittle fracture. Description of Mohs scale here