| Photo no | Section no | Description, observation | Deposit type | Location | Country | nicols | Photo width | Photograph by | Chapter in the MOI course |
| Section OM-69 | Iron poor translucide colloform sphalerite (Schalenblende) | MVT deposit | Wiesloch | Germany | Parallel nicols | 2.65 mm | Marc Polliand, 1998 | Chapter C | |
| Section OM-69 | Same as photo MO-1 | MVT deposit | Wiesloch | Germany | Crossed nicols | 2.65 mm | Marc Polliand, 1998 | Chapter C | |
| Section OM-254 | Euhedral arsenopyrite with pyrrhotite, pyrite and sphalerite | - | Dale Head, North vein | England | Parallel nicols | 1.33 mm | Marc Polliand, 1998 | Chapters A and B | |
| Section OM-248 | Pyrite, marcasite (see anisotropy in photo MO-5) and pyrrhotite largely transformed to Zwischenprodukt | massive sulphide deposit | Chisel | Canada | Parallel nicols | 0.53 mm | Marc Polliand, 1998 | Chapter B | |
| Section OM-248 | Same as photo MO-4 | massive sulphide deposit | Chisel | Canada | Crossed nicols | 0.53 mm | Marc Polliand, 1998 | Chapter B | |
| Section OM-214 | Covellite almost monomineralic in fine elongated grains | polymetallic vein | Yauricocha | Peru | Parallel nicols | 2.13 mm | Marc Polliand, 1998 | Chapters B and H | |
| Section OM-214 | Same as photo MO-6 | polymetallic vein | Yauricocha | Peru | Crossed nicols | 2.13 mm | Marc Polliand, 1998 | Chapters B and H | |
| Section OM-216 | Specular hematite | - | - | Spain | Parallel nicols | 0.66 mm | Marc Polliand, 1998 | Chapter F | |
| Section OM-216 | Same as photo MO-8. Observe the blood-red internal reflections | - | - | Spain | Crossed nicols | 0.66 mm | Marc Polliand, 1998 | Chapter F | |
| Section OM-20 | Native gold as interstitial filling in part in tiny cavities in arsenopyrite partly idiomorphic | - | Giant Yellowknife, North west Territory | Canada | Parallel nicols | 0.66 mm | Marc Polliand, 1998 | Chapter E | |
| Section OM-248 | Rutile grain showing the typical lamellae twinning | - | Chisel | Canada | Parallel nicols, Oil immersion | 0.21 mm | Marc Polliand, 1998 | Chapter B | |
| Section OM-248 | Same as photo MO-11. Observe the strong internal reflections | - | Chisel | Canada | Crossed nicols | 0.21 mm | Marc Polliand, 1998 | Chapter B | |
| Section OM-249 | Exsolution of magnetite and ulvospinel within two adjacent grains of ilmenite | - | Sanford Lake, New York | USA | Parallel nicols, Oil immersion | 0.26 mm | Marc Polliand, 1998 | Chapter F | |
| Section OM-249 | Same as photo MO-13 | - | Sanford Lake, New York | USA | Crossed nicols | 0.26 mm | Marc Polliand, 1998 | Chapter F | |
| Section OM-16 | Lamellae grains of covellite replacing enargite and in part pyrite | high temperature carbonate replacement | Yauricocha | Peru | Parallel nicols | 0.66 mm | Marc Polliand, 1998 | Chapters B and H | |
| Section OM-16 | Same as photo MO-15 | high temperature carbonate replacement | Yauricocha | Peru | Crossed nicols | 0.66 mm | Marc Polliand, 1998 | Chapters B and H | |
| Section OM-18 | Pyrrhotite, pentlandite (upper left), galena, chalcopyrite and mackinawite in cubanite | layered mafic intrusion | Sudbury | Canada | Parallel nicols | 1.33 mm | Marc Polliand, 1998 | Chapter G | |
| Section OM-18 | Same as photo MO-17 | layered mafic intrusion | Sudbury | Canada | Crossed nicols | 1.33 mm | Marc Polliand, 1998 | Chapter G | |
| Section OM-56 | Boulangerite showing typical anisotropy with parallel nicols, with sphalerite (upper left, see internal reflections in the photo with crossed nicols), and chalcopyrite (note the relatively clear anisotropy of chalcopyrite) | metamorphosed massive sulfide | Bayerland | Germany | Parallel nicols | 0.88 mm | Marc Polliand, 1998 | Chapter H | |
| Section OM-56 | Same as photo MO-19. Observe the bluish anisotropy colour in boulangerite | metamorphosed massive sulfide | Bayerland | Germany | Crossed nicols | 0.88 mm | Marc Polliand, 1998 | Chapter H | |
| Section OM-97 | Intergrowth of sphalerite, arsenopyrite (in part euhedral), galena (observe typical triangles), and boulangerite (greenish) surrounded by Fahlore | metamorphosed massive sulfide | Rävlidmyram | Sweden | Parallel nicols | 0.53 mm | Marc Polliand, 1998 | Chapter H | |
| Same as photo MO-21 | metamorphosed massive sulfide | Rävlidmyram | Sweden | Crossed nicols | 0.53 mm | Marc Polliand, 1998 | Chapter H | ||
| Section OM-97 | Sphalerite (e.g., upper right), arsenopyrite (euhedral), Fahlore (in the center surrounded by galena), boulangerite (greenish and anisotropic mineral between galena and sphalerite, at the lower right corner), and galena (most reflective mineral), associated to carbonates with typical polysynthetic twinning | metamorphosed massive sulfide | Rävlidmyram | Sweden | Parallel nicols | 0.42 mm | Marc Polliand, 1998 | Chapter H | |
| Section OM-97 | Same as photo MO-23 | metamorphosed massive sulfide | Rävlidmyram | Sweden | Crossed nicols | 0.42 mm | Marc Polliand, 1998 | Chapter H | |
| Section OM-4 | Pyrite, sphalerite, chalcopyrite and galena | sediment hosted massive sulphide | Rammelsberg | Germany | Parallel nicols | 1.06 mm | Michael Doppler, 1992 | Chapters A, B and C | |
| Section OM-72 | Pyrite and magnetite in pyrrhotite. Obseve the pyrrhotite bireflection. | metamorphosed massive sulfide | Ducktown | USA | Parallel nicols | 2.13 mm | Michael Doppler, 1992 | Chapter B | |
| Section OM-220 | Native silver, löllingite (euhedral), arsenopyrite and sphalerite in a carbonate gangue | epithermal veins | Chañarcillo | Chile | Parallel nicols | 0.53 mm | Michael Doppler, 1992 | Chapter E | |
| Section OM-222 | Native gold between pyrite and galene. Gold and galena occur also along veinlets within pyrite | mesothermal deposit | Pataz | Peru | Parallel nicols | 0.53 mm | Michael Doppler, 1992 | Chapter E | |
| Section OM-49 | Bravoite showing typical zoning with pyrite and sphalerite grains in a sulfide concentrate. | sandstone hosted MVT deposit | Maubach | Germany | Parallel nicols | 0.21 mm | Michael Doppler, 1992 | Chapter G | |
| Section OM-130 | Martitization, Observe hematite replacing euhedral magnetite | - | El Laco | Chile | Parallel nicols | 0.53 mm | Michael Doppler, 1992 | Chapter F | |
| Section OM-60 | Exsolutions of ilmenite and ulvospinel in magnetite. | - | Taberg | Sweden | Parallel nicols | 0.21 mm | Michael Doppler, 1992 | Chapter F | |
| Section OM-229 | Digenite (blue) and chalcocite mantling bornite grains. Hematite crystals (whitish) at the upper left part and, with an atypical blueish color in the center, whitin the chalcocite. | - | Carolina de Michilla | Chile | Parallel nicols | 0.53 mm | Michael Doppler, 1992 | Chapter G | |
| Section OM-228 | Bornite being replaced by chalcocite and hematite (strong relief), relictic pyrite is also present. | - | Buena Esperanza | Chile | Parallel nicols | 0.88 mm | Michael Doppler, 1992 | Chapter G | |
| Section OM-47 | Graphite in metamorphosed black shale | black shale | Outukumpu | Finland | Parallel nicols | 0.53 mm | Michael Doppler, 1992 | Chapter E | |
| Section OM-48 | Same as photo MO-34. Observe the strong anisotropy of graphite. | - | Outukumpu | Finland | Half crossed nicols | 0.53 mm | Michael Doppler, 1992 | Chapter E | |
| Section OM-71 | Idiomorphic grains of chromite (dark gray) cemented by nickeline (orange), rammelsgergite (white) and ilmenite (mineral in the center more reflective than chromite). | podiform chromite | Los Jarales, Ronda Peridotita | Spain | Parallel nicols | 0.53 mm | Michael Doppler, 1992 | Chapter G | |
| Section FMR 2-4 | Skutterudite in subhedral grains (left) and some minor euhedral grains of safflorite. | - | Bou Azzer, Meshui | Morocco | Parallel nicols | 4.2 mm | Philippe Stucky, 1999 | Advanced | |
| Section FMR 2-4 | Zoned safflorite-löllingite?. Note the strong anisotropy from bluish to yellowish tints. | - | Bou Azzer, Meshui | Morocco | Crossed nicols | 2,125 mm | Philippe Stucky, 1999 | Advanced | |
| Section FMR 2-3 | Skutterudite enclosing sub-to euhedral löllingite (with more yellowish tint). See similar picture in Picot and Johan (1982) | - | Bou Azzer, Meshui | Morocco | Parallel nicols | 2.1 mm | Philippe Stucky, 1999 | Advanced | |
| Section FMR 2-3 | Löllingite- safflorite? in zoned subhedral crystals. | - | Bou Azzer, Meshui | Morocco | Crossed nicols | 2.1 mm | Philippe Stucky, 1999 | Advanced | |
| FE-83-1 | Subhedral chromite crystals (dark gray) and insterstitial nickeline grains . Note single ilmenite grain (gray) with minute inclusions of magnetite (a little ligther). | Ronda Peridotite | La Gallega | Spain | Parallel nicols | 1,06 mm | Sébastien Beuchat, 1999 | Advanced | |
| FE-83-1 | Rounded grains of nickeline (light yellow) associated to gersdorffite (very light gray) within a chromite mosaic. | Ronda Peridotite | La Gallega | Spain | Parallel nicols | 0.53 mm | Sébastien Beuchat, 1999 | Advanced | |
| OM-208c | Massive geocronite showing partly polysynthetic twinning. | Zn-Pb skarn | Atacocha | Peru | Crossed nicols | 1.06 mm | Ronner Bendezú, 1999 | Advanced | |
| OM-252 | Chalcopyrite (yellow) and cubanite (light brown) enclosing elongated pyrrhotite (pinkish) grains. | - | Komori Mine | Japan | Parallel nicols | 1.06 mm | Ronner Bendezú, 1999 | Advanced | |
| OM-252 | Same as photo MO 44 but with crossed nicols and rotated. Note the light blue anisoptropy of cubanite. | - | Komori Mine | Japan | Crossed nicols and rotated | 1.06 mm | Ronner Bendezú, 1999 | Advanced |
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