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Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Typical lauraniite from the type locality with chalcocite.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Triangular spiky intense blue lauraniite crystals in a cavity. Holotype material. Sony Alpha 7R ii/Mitutoyo Plan Apo X 20/180 mm Achromatic doublet retro/"Stone Master Stack Unit "/ Linear-actor & Control/ Aperture. Photo & Collection: Christophe Boutry.
© Christophe Boutry
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM-EDS & PXRD confirmed lauraniite from the type locality.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
A rich deposition of tabular, light blue-green micro crystalline and crystals of Lauraniite covers most of the front and back of the matrix. Minor amounts of micro Serpierite, Otavite, Tennantite and Baryte were also confirmed by Joy Desor, by XRD and EDS. Personal collection of Sharon Cisneros.
© Eugene & Sharon Cisneros
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Dark blue fine-grained braithwaiteite with pale blue lavendulan-lemanskiite. Ex Werner Paar.
© Van King
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lauraniite, fov approx 2mm, determination by EDS and XRD (J. Plasil), see corresponding analysis
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Co-type material
© Weinrich Minerals, Inc.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lammerite (the original material from the type locality). Foto Peter Huber.
© Peter Huber
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lauraniite, fov approx 100µm, determination by EDS (and subsequent XRD), see corresponding EDS spectrum in other child photo.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Sony A7R ii, bellows, Mitutoyo M Plan 50x SL, aperture, Raynox DCR-250 retro, Stack-Master linear actor, stack shot control. Collection and photo Stephan Wolfsried
© Stephan Wolfsried 3/2016
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM picture of lauraniite from Laurani.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
BSD picture of lauraniite from Laurani mine.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Extremely small, blue crystals of lauraniite on a metallic matrix. Originally labelled as niedermayrite. New information has shown that this is lauraniite. Acquired from Joy Desor. Associated mineral, not in the photograph is polybasite. Brent Thorne specimen and photograph.
© Brent Thorne 2016
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM picture of lauraniite from Laurani.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Co-type material
© Weinrich Minerals, Inc.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM picture of lauraniite from Laurani.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lauraniite, determination by EDS and subsequent XRD (J. Plasil).
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Inclusion of native gold (greenish grey grain, top right) in polysynthetic twinned famatinite (greenish, brownish, blueish rotation tints), with alteration product cuprite in vugs (crimson-red internal reflections), Reflected light digital image in air with crossed polars. Width of image 0.2 mm. Ore microscopy is the only method that ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (blue, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (blue, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Pyrite crystals (crème yellow), in association with chalcopyrite (yellow), bornite (reddish-brown), tetraedrite (grey), and famatinite (pale pinkish-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Inclusion of native gold (bright yellow, top right) in polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), with tetraedrite (light-grey), and alteration product cuprite in vug. (reddish internal reflections). Reflected plane polarized light digital image in air. Width of image 0.2 mm. Ore microscopy is the only method ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (blue-grey). Reflected plane polarized light digital image in air. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true reflectance ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, blueish, purplish-red rotation tints), in association with pyrite (very weak anisotropism), tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with partially crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of pyrite (light-yellow) in association with polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), tetraedrite (pale blue), and cuprite (pale blue-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Intense blue triangular spiky lauraniite crystals in cavity. Holotype material. Sony Alpha 7R ii/Mitutoyo Plan Apo X 20/180 mm Achromatic doublet retro/"Stone Master Stack Unit "/ Linear-actor & Control/ Aperture. Photo & Collection: Christophe Boutry.
© Christophe Boutry
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with pyrite (light yellow), tetraedrite (light-grey), and cuprite (pale blue). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue-grey). Reflected plane polarized light digital image in air. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true reflectance ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, brownish, blueish rotation tints), in association with pyrite (very weak anisotropism), tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue). Reflected plane polarized light digital image in air. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true reflectance ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with pyrite (bright), tetraedrite (blueish-grey), and cuprite (grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (reddish-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Light blue lauraniite microcrystals forming clusters up to 0.25 mm. Micromount specimen purchased from Sönke Stolze in August 2025. Canon EOS M50 camera + 113 mm extension tube wit Raynox DCR-250 (reversed) and Wemacro M Plan Apo 20X / 0,50 DIC microscope objective. Stacking of 347 shots with Wemacro rail (1 μm/step) and processed with ...
© Alfonso Frías Forcada
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Typical lauraniite from the type locality with chalcocite.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Triangular spiky intense blue lauraniite crystals in a cavity. Holotype material. Sony Alpha 7R ii/Mitutoyo Plan Apo X 20/180 mm Achromatic doublet retro/"Stone Master Stack Unit "/ Linear-actor & Control/ Aperture. Photo & Collection: Christophe Boutry.
© Christophe Boutry
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM-EDS & PXRD confirmed lauraniite from the type locality.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lauraniite, fov approx 2mm, determination by EDS and XRD (J. Plasil), see corresponding analysis
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
A rich deposition of tabular, light blue-green micro crystalline and crystals of Lauraniite covers most of the front and back of the matrix. Minor amounts of micro Serpierite, Otavite, Tennantite and Baryte were also confirmed by Joy Desor, by XRD and EDS. Personal collection of Sharon Cisneros.
© Eugene & Sharon Cisneros
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Dark blue fine-grained braithwaiteite with pale blue lavendulan-lemanskiite. Ex Werner Paar.
© Van King
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Co-type material
© Weinrich Minerals, Inc.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lammerite (the original material from the type locality). Foto Peter Huber.
© Peter Huber
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lauraniite, fov approx 100µm, determination by EDS (and subsequent XRD), see corresponding EDS spectrum in other child photo.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
BSD picture of lauraniite from Laurani mine.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Sony A7R ii, bellows, Mitutoyo M Plan 50x SL, aperture, Raynox DCR-250 retro, Stack-Master linear actor, stack shot control. Collection and photo Stephan Wolfsried
© Stephan Wolfsried 3/2016
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM picture of lauraniite from Laurani.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Extremely small, blue crystals of lauraniite on a metallic matrix. Originally labelled as niedermayrite. New information has shown that this is lauraniite. Acquired from Joy Desor. Associated mineral, not in the photograph is polybasite. Brent Thorne specimen and photograph.
© Brent Thorne 2016
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM picture of lauraniite from Laurani.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Co-type material
© Weinrich Minerals, Inc.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Inclusion of native gold (greenish grey grain, top right) in polysynthetic twinned famatinite (greenish, brownish, blueish rotation tints), with alteration product cuprite in vugs (crimson-red internal reflections), Reflected light digital image in air with crossed polars. Width of image 0.2 mm. Ore microscopy is the only method that ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
SEM picture of lauraniite from Laurani.
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Lauraniite, determination by EDS and subsequent XRD (J. Plasil).
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (blue, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Inclusion of native gold (bright yellow, top right) in polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), with tetraedrite (light-grey), and alteration product cuprite in vug. (reddish internal reflections). Reflected plane polarized light digital image in air. Width of image 0.2 mm. Ore microscopy is the only method ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (blue, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Pyrite crystals (crème yellow), in association with chalcopyrite (yellow), bornite (reddish-brown), tetraedrite (grey), and famatinite (pale pinkish-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (blue-grey). Reflected plane polarized light digital image in air. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true reflectance ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, blueish, purplish-red rotation tints), in association with pyrite (very weak anisotropism), tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with partially crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of pyrite (light-yellow) in association with polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), tetraedrite (pale blue), and cuprite (pale blue-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Intense blue triangular spiky lauraniite crystals in cavity. Holotype material. Sony Alpha 7R ii/Mitutoyo Plan Apo X 20/180 mm Achromatic doublet retro/"Stone Master Stack Unit "/ Linear-actor & Control/ Aperture. Photo & Collection: Christophe Boutry.
© Christophe Boutry
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with pyrite (light yellow), tetraedrite (light-grey), and cuprite (pale blue). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue-grey). Reflected plane polarized light digital image in air. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true reflectance ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, brownish, blueish rotation tints), in association with pyrite (very weak anisotropism), tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with pyrite (bright), tetraedrite (blueish-grey), and cuprite (grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue). Reflected plane polarized light digital image in air. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true reflectance ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (pale blue-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” with true ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Polysynthetic twinned famatinite (greenish, blueish, orange, purplish-red rotation tints), in association with tetraedrite, and cuprite (crimson-red internal reflections). Reflected light digital image in air with crossed polars. Width of image 1 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Porous aggregate of polysynthetic twinned famatinite (pale brownish-pink reflectance pleochroism), in association with tetraedrite (light-grey), and cuprite (reddish-grey). Reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy is the only method that illuminates the darkness of the opaque “grey ugly” ...
© Günter Grundmann, Detmold
Laurani Mine, Sica Sica Municipality, Aroma Province, La Paz, Bolivia
Light blue lauraniite microcrystals forming clusters up to 0.25 mm. Micromount specimen purchased from Sönke Stolze in August 2025. Canon EOS M50 camera + 113 mm extension tube wit Raynox DCR-250 (reversed) and Wemacro M Plan Apo 20X / 0,50 DIC microscope objective. Stacking of 347 shots with Wemacro rail (1 μm/step) and processed with ...
© Alfonso Frías Forcada
