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The Vimeo-hosted versions of these video are also search-engine discoverable, and can be found by searching for the term “thin section” coupled with the sample number (e.g. “thin section FKM-49”), with or without also including the accompanying mineral name. YouTube-hosted versions of these videos are no longer search-engine discoverable (in protest of YouTube polluting even short educational videos with non-optional ads… grrr!), but can still be found organized in playlists on my rockPTX YouTube channel.
mineral | PPL (lower polar rotation) |
PPL (stage rotation) |
XP (stage rotation) |
optic figure (stage rotation) |
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anthophyllite (FKM-186): anthophyllite amphibole in meta-blackwall, with phlogopite |
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proto-ferro-suenoite (FKM-190): proto-ferro-suenoite (3.14 to 3.91 VIFe2+ apfu; 1.58 to 1.87 VIIIMn2+ apfu) amphibole (formerly “proto-mangano-ferro-anthophyllite”) in high grade meta-Mn-metasomatite, with rhodochrosite, quartz, spessartine garnet and pyroxmangite |
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clino-suenoite (FKM-122): anomalously B(-) clino-suenoite (4.91 VIMg apfu; 1.25 VIIIMn2+ apfu) amphibole (formerly “tirodite” or “manganocummingtonite”) in Mn-rich pod in granulite facies metasomatized meta-evaporite, with donpeacorite orthopyroxene |
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clino-ferro-suenoite (FKM-94): clino-ferro-suenoite (3.08 VIFe2+ apfu; 1.34 VIIIMn2+ apfu) amphibole (formerly “dannemorite” or “manganogrunerite”) in granulite facies metasomatized-Mn-Zn-Pb exhalite, with Fe-bearing pyroxmangite and Fe-bearing spessartine garnet |
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“sodic-gedrite” (FKM-11): “sodic-gedrite” (0.58 XIINa apfu) amphibole in granulite facies meta-blackwall, with sapphirine and phlogopite mica |
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tremolite (FKM-26): V-bearing (0.31 V apfu) tremolite-magnesio-hornblende near-boundary composition amphibole in high grade calc-silicate, with calcite, quartz and diopside clinopyroxene |
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tremolite (FKM-123): lilac tremolite (“hexagonite”) amphibole in high grade calcareous meta-evaporite |
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tremolite (FKM-276): Cr-bearing tremolite (0.03 to 0.06 Cr apfu) amphibole in granulite facies metasomatic calcareous meta-evaporite, with quartz and oxy-chromium-dravite tourmaline |
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actinolite (FKM-95): actinolite (2.36 Fe2+ apfu) amphibole in greenschist facies meta-BIF, with magnetite, quartz and calcite |
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magnesio-hornblende (FKM-161): Mn-bearing magnesio-hornblende (3.86 VIMg apfu; 0.23 VIIIMn2+ apfu) amphibole in amphibolite facies Ca-metasomatite, with quartz |
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tschermakite (FKM-24): tschermakite (2.97 VIMg apfu; 1.04 VIAl apfu; 0.94 Fe3+ apfu) amphibole in high grade amphibolite, with anorthite plagioclase feldspar |
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pargasite (FKM-11): pargasite amphibole in granulite facies meta-blackwall, with sapphirine and “sodic-gedrite” amphibole |
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pargasite (FKM-16): pargasite (4.06 Mg apfu) amphibole in metasomatic amphibolite, with chrysoberyl |
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pargasite (FKM-68): Cr-bearing pargasite (0.07 Cr apfu) amphibole in high grade meta-gabbroid, with zoisite and corundum |
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pargasite (FKM-290): Cr-bearing pargasite (0.13 Cr apfu amphibole in high grade meta-gabbroid, with epidote, clinochlore chlorite, Cr-bearing spinel and zoisite |
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mangani-pargasite (FKM-387): mangani-pargasite amphibole in Mn metasomatite, with calcite and hausmannite |
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magnesio-hastingsite (FKM-96): potassian magnesio-hastingsite (0.32 K apfu; 2.22 VIMg apfu; 0.80 Fe3+ apfu; 0.38 Ti apfu) amphibole in granulite facies meta-tonalite, with plagioclase |
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magnesio-hastingsite (FKM-264): magnesio-hastingsite (3.70 VIMg apfu; 0.75 Fe3+ apfu) amphibole in alkaline ultramafic intrusive, with calcite |
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magnesio-hastingsite (FKM-265): magnesio-hastingsite (3.47 to 3.80 VIMg apfu; 0.71 Fe3+ apfu; 0.02 Cr apfu) amphibole in alkaline ultramafic intrusive, with calcite and diopside |
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potassic-magnesio-hastingsite (FKM-21): potassic-magnesio-hastingsite amphibole in K-Cl-Fe metasomatite, with magnetite |
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hastingsite (FKM-33): K- and Cl-bearing (0.39 K apfu; 0.26 Cl apfu) hastingsite amphibole in high grade K-Cl-Fe metasomatite, with biotite mica |
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ferri-kaersutite (FKM-49): zoned ferri-kaersutite (yellow/brown core) to magnesio-hastingsite (yellow/green rim) amphibole in nepheline syenite, with clinopyroxene, apatite, titanite, plagioclase and an opaque oxide |
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ferri-kaersutite (FKM-251): potassian ferri-kaersutite amphibole in essexite, with biotite, apatite, titanite, plagioclase and nepheline |
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winchite (FKM-74): zoned winchite-richterite-actinolite near-boundary composition amphibole in carbonatite-associated K-metasomatite, with diopside clinopyroxene, microcline K-feldspar and calcite |
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barroisite (FKM-34): zoned barroisite to taramite amphibole in eclogite facies metabasite, with garnet, rutile, quartz and zoisite |
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fluoro-richterite (FKM-27): fluoro-richterite amphibole in metamorposed agpaitic syenite, with eudialyte, K-feldspar, aegirine clinopyroxene and fluorite |
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fluoro-richterite (FKM-65): fluoro-richterite amphibole in metamorposed agpaitic syenite, with alkali feldspar |
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ferro-ferri-katophorite (FKM-249): ferro-ferri-katophorite to near boundary composition ferro-ferri-taramite amphibole in miaskitic nepheline syenite, with aegirine-augite clinopyroxene, alkali feldspar and nepheline |
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ferro-ferri-fluoro-katophorite (FKM-305): ferro-ferri-fluoro-katophorite (0.94 F apfu; ~3.52 CFeT apfu) amphibole in alkali feldspar microsyenite, with Na-sanidine (K-feldspar) |
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hjalmarite (FKM-299): Mn+Fe-bearing (0.67 B[Mn2++Ca] apfu with 0.47 BMn2+ apfu; 0.78 CMn2+ apfu; 0.65 CFe2+ apfu; preceding values based on ∑Si=8) hjalmarite amphibole in meta-Mn-metasomatite, with quartz, rhodonite and yoshimuraite |
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glaucophane (FKM-3): glaucophane amphibole in blueschist, with jadeite clinopyroxene |
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glaucophane (FKM-100): glaucophane amphibole in blueschist, with epidote, phengite mica and quartz |
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glaucophane (FKM-194): glaucophane amphibole in siliceous blueschist, with quartz |
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riebeckite (FKM-139): riebeckite amphibole in peralkaline granite pegmatite, with quartz, microcline and white mica |
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eckermannite (FKM-84): variably Cr-enriched eckermannite amphibole in blueschist facies metamorphosed albitite, with Cr-jadeite and kosmochlor clinopyroxene and chlorite |
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potassic-arfvedsonite (FKM-320): potassic-arfvedsonite amphibole in nepheline syenite |
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magnesio-fluoro-arfvedsonite (FKM-145): zoned magnesio-fluoro-arfvedsonite to fluoro-leakeite amphibole in agpaitic nepheline syenite, with aegirine clinopyroxene and fine-grained unidentified groundmass |
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potassic-magnesio-arfvedsonite (FKM-39): zoned potassic-magnesio-arfvedsonite (core) to potassic-richterite (rim) amphibole in fenite-like K-metasomatite, with charoite and K-feldspar |
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holmquistite (FKM-164): holmquistite amphibole in granite-adjacent Li-metasomatized wallrock, with quartz, chlorite and tourmaline |
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holmquistite (FKM-380): holmquistite amphibole in granite-adjacent Li-metasomatized black-wall, with quartz, and biotite |
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fluoro-leakeite (FKM-175): presumed fluoro-leakeite (Li analysis pending) in agpaitic nepheline syenite, with aegirine clinopyroxene, nepheline and alkali feldspar |
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ferri-fluoro-leakeite (FKM-256): ferri-fluoro-leakeite in albitized granite, with aegirine-augite, quartz and alkali feldspar (100X) |
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mangano-mangani-ungarettiite (FKM-30): zoned mangano-mangani-ungarettiite to potassic-mangano-mangani-ungarettiite amphibole in meta-Mn-metasomatite, with serandite and quartz |
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inesite (FKM-76): inesite in hydrothermal Mn-rich quartz-carbonate vein, with quartz and calcite |
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tinaksite (FKM-39b): tinaksite in fenite-like K-metasomatite, with charoite |
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astrophyllite (FKM-227): astrophyllite in nepheline syenite, with plagioclase and aegirine clinopyroxene |
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serendibite (FKM-135): serendibite in calc-silicate high grade B-bearing Mg-calc-silicate, with tourmaline, phlogopite mica and calcite |
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serendibite (FKM-295): serendibite in high grade B-bearing skarn, with diopside clinopyroxene |
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sapphirine (FKM-11): sapphirine (0.43 FeT apfu) in granulite facies meta-blackwall, with phlogopite mica |
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sapphirine (FKM-23): sapphirine (up to 2.26 FeT apfu) in granulite facies metapelite, with cordierite, sillimanite, garnet and rutile |
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neptunite (FKM-244): neptunite in serpentine-hosted natrolite veins, with benitoite and natrolite(?) |
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sorosilicates and cyclosilicates in thin section
single chain inosilicates in thin section
phyllosilicates in thin section
tectosilicates and miscellaneous silicates in thin section