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Ortenzi Andrea's Photo Gallery

FNR-8H6Witherite : BaCO3

San Cristoforo landslide, Bobbio, Trebbia Valley, Piacenza Province, Emilia-Romagna, Italy

Dimensions: 30 mm x 30 mm x 20 mm
Field of View: 1.1 mm
Largest Crystal Size: 0.7 mm
Weight: 15 g

Witherite crystal showing the typical crystal habit of the species. The witherite is in this case pristine, but is normally altering to barite or is completely dissolved. Photo taken at the TM3030 tabletop microscope (Hitachi). The witherite was identified through EDX analyses.
Photo ID: 856654     Uploaded by: Ortenzi Andrea   View Count: 11   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

U0P-MD1Scheelite : Ca(WO4), Cassiterite : SnO2, Magnetite : Fe2+Fe3+2O4

Cape Calamita Mine, Capoliveri, Elba Island, Livorno Province, Tuscany, Italy

Dimensions: 15 mm x 10 mm x 10 mm
Field of View: 200 μm
Largest Crystal Size: 60 μm
Weight: 3 g

The scheelite crystal (white) engulfs prysmatic crystals of cassiterite (slightly darker with respect to scheelite). Cassiterite was identified through EDX analyses. Both scheelite and cassiterite are surrounded by magnetite (grey) crystals. Tiny grains or crystals of W–Sn mineral phases (ferberite, scheelite, and cassiterite), that are disseminated throughout the iron ore matrix, are a very distinctive characteristic of the hematite-rich ores from Elba Island iron mines, which allows to distinguish them from other European iron ores [see https://www.mindat.org/loc-2150.html].
Largest crystal size is referred to cassiterite. The photo has been taken at the Hitachi TM3030 table top microscope
Photo ID: 855883     Uploaded by: Ortenzi Andrea   View Count: 24   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

XKH-16PAtacamite : Cu2(OH)3Cl

Cape Calamita Mine, Capoliveri, Elba Island, Livorno Province, Tuscany, Italy

Dimensions: 50 mm x 50 mm x 30 mm
Field of View: 200 μm
Largest Crystal Size: 100 μm
Weight: 20 g

Atacamite crystals found in the Cape Calamita Mine in November 2017. The crystals form crystalline crusts along microfractures in a deeply altered rock. The aspect of the crystals is consistent with atacamite instead of clinoatacamite. Photo taken at the Scanning Electron Microscope Hitachi TM-3030 Tabletop Microscope.
Photo ID: 855879     Uploaded by: Ortenzi Andrea   View Count: 18   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

02Y-F6VScheelite : Ca(WO4), Magnetite : Fe2+Fe3+2O4, Calcite : CaCO3

Cape Calamita Mine, Capoliveri, Elba Island, Livorno Province, Tuscany, Italy

Dimensions: 30 mm x 10 mm x 10 mm
Largest Crystal Size: 1 mm
Weight: 10 g

The scheelite crystal (white) has been found in small vugs of massive magnetite (grey) in association with with calcite (dark gray) microcrystals. The crystal is complete. The identification was confirmed by EDX microanalyses.
Photo ID: 855730     Uploaded by: Ortenzi Andrea   View Count: 15   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

G9X-7DPGold : Au, Diopside : CaMgSi2O6

Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy

Dimensions: 20 mm x 10 mm x 5 mm
Field of View: 1 mm
Largest Crystal Size: 0.4 mm
Weight: 5 g

The gold particle (very bright) is probably embedded into Cr-diopside (dark grey), while the darkest mineral is quartz. An EDX spectrum done on the Cr-diopside shows Si, Ca, Mg, Cr, and Fe as main peaks.
Photo ID: 842206     Uploaded by: Ortenzi Andrea   View Count: 20   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

CXC-DL4Braunite : Mn2+Mn3+6(SiO4)O8, Albite : Na(AlSi3O8)

Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy

Field of View: 1 mm
Largest Crystal Size: 0.6 mm
Weight: 10 g

A pseudo-hexagonal braunite crystal, probably a twin, sits on the cleavage surface of albite. The crystal comes from the renewed locality of Prabornaz, mined and searched since the 16th century for manganese, mostly used in the glass factories of the Republic of Venice.
Photo ID: 827312     Uploaded by: Ortenzi Andrea   View Count: 37   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

MK9-Q9WRoméite Group, Braunite : Mn2+Mn3+6(SiO4)O8, Albite : Na(AlSi3O8)

Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy

Field of View: 0.3 mm
Largest Crystal Size: 0.1 mm
Weight: 12 g

The octahedral roméite crystal (bright at center) is accompanied by small and more complex crystals. Braunite is slightly darker and sits at the bottom left of the roméite main crystal. Albite (dark) forms the groundmass. Self collected in June 2017. The roméite seems to be, on the basis of EDX analyses, Sb-rich.
Photo ID: 827311     Uploaded by: Ortenzi Andrea   View Count: 28   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

81C-P4VTitanite (Var: Greenovite) : CaTi(SiO4)O, Braunite : Mn2+Mn3+6(SiO4)O8, Albite : Na(AlSi3O8)

Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy

Field of View: 1.8 mm
Largest Crystal Size: 1 mm
Weight: 10 g

A bulky greenovite crystal in braunite (brighter) and albite (darker). This is a Mn-rich variety of titanite. Self collected on the 10th of June, 2017.
Photo ID: 826946     Uploaded by: Ortenzi Andrea   View Count: 25   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

34H-8U4Anatase : TiO2, Quartz : SiO2

Bernina Beach, Trebbia River, Bobbio, Trebbia Valley, Piacenza Province, Emilia-Romagna, Italy

Field of View: 2 mm
Largest Crystal Size: 1.5 mm

An anatase crystal collected by myself in April 2017. The crystals are usually black in the central part and orange-brown at tips.
Photo ID: 818122     Uploaded by: Ortenzi Andrea   View Count: 30   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)

CRF-LHWBrookite : TiO2, Quartz : SiO2

Bernina Beach, Trebbia River, Bobbio, Trebbia Valley, Piacenza Province, Emilia-Romagna, Italy

Field of View: 0.6 mm
Largest Crystal Size: 0.3 mm
Weight: 15 g

A brookite crystal on quartz collected in April 2017
Photo ID: 818121     Uploaded by: Ortenzi Andrea   View Count: 33   Approval status: Public galleries    Type: Photo - 1280 x 1100 pixels (1.4 Mpix)
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