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| mineral | PPL (lower polar rotation) |
PPL (stage rotation) |
XP (stage rotation) |
optic figure (stage rotation) |
|---|---|---|---|---|
| melilite (FKM-56): Na-rich melilite (0.36 Na apfu; 0.46 Mg apfu) in haüyne melilitolite (“okaite”), with calcite, phlogopite trioctahedral mica, apatite and magnetite |
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| melilite (FKM-114): Na-rich melilite (0.36 Na apfu; 0.53 Mg apfu) in olivine melilitite, with forsterite olivine, diopside clinopyroxene and nepheline |
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| åkermanite (FKM-262): åkermanite-dominant (0.23 Al apfu; 0.67 Mg apfu; 0.25 Na apfu) melilite in alkaline ultramafic intrusive, with diopside clinopyroxene |
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| gehlenite (FKM-271): Fe-rich gehlenite-dominant (0.30 Fe3+ apfu) melilite in pyrometamorphic sanidinite facies phosphatic metacarbonate, with apatite and brown cebollite (note: thin section is slightly thick) |
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| hardystonite (FKM-303): zoned hardystonite (main: 0.09 [Al+Mg+Fe] apfu & 0.06 Na apfu; patchy: 0.05 [Sr+Pb] apfu) in high-grade Mn-Zn metasomatite, with bustamite and andradite garnet |
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| bertrandite (FKM-209): open-space filling bertrandite sheaves in granite pegmatite, with fluorapatite |
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| bertrandite (FKM-291): bertrandite in skarn, with quartz and carbonate |
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| tinzenite (FKM-185): tinzenite (axinite group) in metasomatized meta-Mn-exhalite, with quartz |
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| lawsonite (FKM-109): lawsonite in blueschist facies metabasite, with garnet, glaucophane amphibole, white mica and chlorite |
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| niocalite (FKM-57): niocalite in sövite carbonatite, with calcite and apatite |
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| hiortdahlite (FKM-315): hiortdahlite in metamorposed agpaitic syenite, with fluorite, alkali feldspar (primarily microcline) and zoned omphacite/aegirine-augite clinopyroxene |
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| mosandrite-(Ce) (FKM-65): mosandrite-(Ce) in metamorposed agpaitic syenite, with microcline K-feldspar, eudialyte and fluoro-richterite amphibole |
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| mosandrite-(Ce) (FKM-145): mosandrite-(Ce) in agpaitic nepheline syenite, with arfvedsonite amphibole, aegirine clinopyroxene, eudialyte and nepheline |
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| lamprophyllite (FKM-17): lamprophyllite in nepheline syenite, with aegirine, nepheline and microcline |
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| melanotekite (FKM-86): melanotekite in high grade calcareous Ba-Mn-metasomatite, with phlogopite trioctahedral mica |
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| strontioruizite (FKM-173): orange strontioruizite (1.82 Sr apfu) in Mn-metasomatite, with aluminosugilite/sugilite ss, quartz, pectolite and fine-grained aegirine. |
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| prismatine (FKM-59): prismatine (kornerupine group) in granulite facies B-bearing metapelite, with plagioclase feldspar and tourmaline |
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| allanite-(Ce) (FKM-131): allanite-(Ce) (epidote group) in calc-silicate REE-U metasomatite, with andradite garnet |
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| ferriallanite-(Ce) (FKM-89): anomalously low-2V° ferriallanite-(Ce) (epidote group) in REE-metasomatite, with cerite-(Ce) and tremolite amphibole |
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| dollaseite-(Ce) (FKM-188): anomalously high-2V° dollaseite-(Ce) (1.69 [M1+M3]Mg apfu; epidote group) in calcareous REE-metasomatite, with tremolite amphibole and calcite |
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| epidote (FKM-4): epidote (0.50 Fe3+ apfu; epidote group) in blueschist, with glaucophane amphibole |
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| epidote (FKM-44): zoned epidote (0.53 Fe3+ apfu core; 0.99 Fe3+ apfu rim; epidote group) in greenschist facies Na-Ca metasomatite, with quartz and chlorite |
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| hancockite (FKM-88): hancockite (epidote group) in high grade calcareous Zn-Mn-Pb-Ba metasomatite, with barite |
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| piemontite (FKM-2): Sr-bearing (0.36 Sr apfu) piemontite (epidote group) in meta-Mn-exhalite, with titanite and quartz |
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| mukhinite (FKM-332): mukhinite (epidote group) in metasomatized low-grade meta-“oil shale”, with tremolite, “chabazite”? and bitumen? |
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| clinozoisite (FKM-168): clinozoisite (0.32 Fe3+ apfu; epidote group) in calc-silicate, with quartz |
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| zoisite (FKM-1): zoisite (“tanzanite”; 1.00 M3Al apfu) in high grade calc-silicate, with grossular garnet, quartz and calcite |
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| zoisite (FKM-68): Cr-bearing zoisite (0.01 Cr apfu in high grade meta-gabbroid, with pargasite amphibole and corundum |
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| zoisite (FKM-290): Cr-bearing zoisite (0.02 Cr apfu in high grade meta-gabbroid |
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| shuiskite-(Mg) (FKM-316): zoned shuiskite-(Mg) (est. 0.31 XCr apfu & 0.62 YCr apfu) to Cr-bearing (est. 0.35 XCr apfu & 1.04 YCr apfu) pumpellyite-(Mg) in altered chromatite, with zoned uvarovite/Cr-bearing grossular garnet |
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| vesuvianite (FKM-110): anomalously biaxial vesuvianite in high grade calc-silicate skarn, with fine-grained undifferentiated alteration minerals |
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| vesuvianite (FKM-263): vesuvianite in Al-rich “calc-skarnoid”, with hibonite and calcite |
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| manganvesuvianite (FKM-334): Cu-bearing manganvesuvianite in Mn-metasomatite, with opaque hausmannite; (note: colorless portion of sample is epoxy) |
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| ganomalite (FKM-324): anomalously B(+) ganomalite in high grade calcareous Mn-metasomatite, with phlogopite, calcite and garnet(?) |
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| yoshimuraite (FKM-299): yoshimuraite in meta-Mn-metasomatite, with rhodonite, hjalmarite amphibole, and quartz |
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| benitoite (FKM-244): benitoite in serpentine-hosted natrolite veins, with neptunite and natrolite(?) |
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| beryl (FKM-288): beryl in granite pegmatite-associated Be-F metasomatite, with phenakite, fluorite and biotite |
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| cordierite (FKM-23): uncommonly B(+) & weakly pleochroic cordierite (1.67 Mg apfu) in granulite facies metapelite, with garnet and rutile |
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| cordierite (FKM-46): uncommonly B(+) cordierite partially altered to pinite in granulite facies B-bearing metapelite, with garnet and K-feldspar |
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| dravite (FKM-292): dravite (2.58 YMg apfu) in tourmaline-bearing mica schist, with muscovite dioctahedral mica |
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| foitite (FKM-70): foitite tourmaline in a B-bearing meta-“advanced argillic” metasomatite, with dumortierite and illite? |
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| uvite (FKM-119): uvite (OH-dominant) tourmaline (anomalously biaxial) in Mg-metasomatic talc schist, with talc |
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| uvite (FKM-210): uvite tourmaline in Mg-metasomatite, with magnesite |
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| oxy-schorl (FKM-85): zoned oxy-schorl tourmaline in granite, with quartz |
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| oxy-schorl/”oxy-olenite” (FKM-281): oxy-schorl with thin near-rim “oxy-olenite” tourmaline in granite, with quartz and orthoclase “perthite” feldspar |
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| oxy-dravite (FKM-102): zoned oxy-dravite (core) to dravite (rim) tourmaline in muscovite biotite mica schist |
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| oxy-dravite (FKM-166): Cr-bearing (0.57 to 0.94 Cr apfu) green oxy-dravite tourmaline in metasomatic fuchsite schist, with quartz and Cr-bearing muscovite dioctahedral mica |
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| oxy-chromium-dravite (FKM-276): bright green oxy-chromium-dravite (4.68 to 5.18 [Y+Z]Cr apfu; [Y+Z]Cr/[Y+Z](Cr+Al) = 0.72 to 0.79) tourmaline in granulite facies metasomatic calcareous meta-evaporite, with quartz and Cr-bearing tremolite amphibole (100X) |
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| povondraite (FKM-71): zoned povondraite to “K-povondraite” tourmaline in meta-evaporite, with alkali feldspar and hydromagnesite? |
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| osumilite (FKM-240): anomalously biaxial osumilite (0.95 Fe2+ apfu; 0.85 Mg apfu) in rhyodacite(?), with tridymite and/or cristobalite |
anomalously biaxial with a mod-low 2V°, but the optic sign was inconclusive & the figure was of too low quality to be useful here | |||
| aluminosugilite (FKM-173): pale lilac aluminosugilite cores (1.10 MAl apfu; 0.57 MMn3+ apfu) rimmed by deeper lilac sugilite (1.11 MFe3+ apfu; 0.72 MMn3+ apfu) in Mn-metasomatite, with quartz, pectolite and fine-grained intergrown amphibole+aegirine. |
presumably U(-), but the birefringence was too low to obtain a figure | |||
| eudialyte (FKM-77): zoned eudialyte in kakortokite, with albite plagioclase |
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| eudialyte (FKM-130): eudialyte in nepheline syenite, with aegirine clinopyroxene and alkali feldspar |
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| eudialyte (FKM-145): eudialyte in agpaitic nepheline syenite, with amphibole, alkali feldspar and nepheline |
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| ferrokentbrooksite (FKM-207): weakly pleochroic and anomalously slightly biaxial irregularly-zoned ferrokentbrooksite to eudialyte (M2Fe2+ > M2Mn2+; 0.76 to 0.17 M3Nb apfu) in agpaitic nepheline syenite, with albite and nepheline |
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| titantaramellite (FKM-53b): titantaramellite in Ba-metasomatite, with quartz, gillespite, actinolite and alforsite |
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| cerchiaraite-(Fe) (FKM-53b): strongly pleochroic zoned cerchiaraite-(Fe) to near cerchiaraite-(Al) in Ba-metasomatite, with sanbornite, gillespite, actinolite and quartz |
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single chain inosilicates in thin section
double chain and more complex inosilicates in thin section
phyllosilicates in thin section
tectosilicates and miscellaneous silicates in thin section