Microscopy

petrographic_thin_section_R008_4x_XPL_pyroxene alteration fibrous amphibole

petrographic thin sectionsingaporerockgeologygombak noritegombak gabbropetrologypetrographymicroscopyphotomicrographphotomicrographypolarized lightmicrographpyroxenefibrous amphiboleplagioclasefeldsparcrossed polarizerscross polarized lightXPLinterference colourbirefringencebirefringentanisotropicanisotropyoptical mineralogy