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optical-mineralogy:S-tectonite with muscovite and quartz in...

optical-mineralogy:Labradorite

optical-mineralogy:S-tectonite with muscovite and quartz in thin...

optical-mineralogy:Websterite in thin sectionClinopyroxene...

optical-mineralogy:This rock is predominantly composed of...

optical-mineralogy:Alkali Feldspar GraniteQuartz, alkali...

optical-mineralogy:Alkali Feldspar crystals are large in this...

optical-mineralogy:The plagioclase in this thin section has...

optical-mineralogy: Alkali Feldspar Granite Quartz, alkali feldspar and muscovite.

optical-mineralogy: The plagioclase in this thin section has polysynthetic twinning. The orthopyroxe

optical-mineralogy: This rock is composed predominantly of plagioclase feldspar that are large euhed

optical-mineralogy: Gabbronorite in thin section Plagioclase Feldspar (anorthite) Clinopyroxene Orth

optical-mineralogy:AnorthositePlagioclase Feldspar (polysynthetic twinning)Clinopyroxene

optical-mineralogy:Olivine groundmass with an orthopyroxene phenocryst

optical-mineralogy:Labradorite