Past Photo of the Day images
8GM-NFJBeryl (Var: Aquamarine) Be3Al2Si6O18
Skardu Area, Gilgit-Baltistan, PakistanDimensions: 28 mm x 9 mm
Etched, pale blue aquamarine crystal with a big (4 mm) motile bubble.
In Coll. M. Slama.
Canon EOS 250D with Tamron SP AF 90mm 2,8 Di VC USD Macro, stacked from 16 Images using Zerene Stacker. (Dmap)
Mindat.org Photo of the Day - 16th Apr 2024
UQV-F0GFalottaite MnC2O4·3H2O , Lindbergite Mn2+(C2O4)·2H2O
Varenche Mine, Saint-Barthélemy, Nus, Aosta Valley, ItalyField of View: 2.66 mm
Comparison before and after pseudomorphosis. On the left, fresh and clear crystal of falottaite; on the right, the same crystal transformed, after 6 months, by pseudomorphosis, due to the loss of a water molecule, in lindbergite. The crystal retains its crystalline characteristics but loses its clarity transforming in a bright white color. Crystal subjected to SEM-EDS analysis. The article on the discovery has just been published in the issue 4-2023 of Micro, periodical of the AMI Italian Micromineralogical Association.
Photo and collection: Franco Luca Bonino.
Mindat.org Photo of the Day - 15th Apr 2024
El Solitario Laccocaldera
Solitario, Presidio County, Texas, USAAround 35.4 Ma a large volume of magma was emplaced as a laccolith, which deformed the overlying rocks into a 10-mile-wide dome. Cretaceous-aged limestone flatirons mark the edge of this structure. Around 4 to 6 cubic miles of ash and pyroclastics erupted from the laccolith magma chamber to create a caldera 4 miles long and 1.2 miles wide, making El Solitario what is known as a laccocaldera.
Photo taken: 16 December 2023.
Camera: Nikon D600
Mindat.org Photo of the Day - 14th Apr 2024
J0Q-VMJCelestine SrSO4
Lviv Oblast, UkraineDimensions: 12 cm x 10 cm x 9 cm
A fracture in matrix filled with large and small celestine crystals: white in daylight, fluorescent white under UV light with greenish afterglow.
A new find in 2022.
Longwave fluorescence.
Mindat.org Photo of the Day - 13th Apr 2024
Glacier Peak View
Glacier Peak Mine, Glacier Peak Mining District, Snohomish County, Washington, USALooking away from the Glacier Peak mines over a small stockpile of oxidized ore. Photo by Bart Cannon, this was one of his favorite pictures.
Mindat.org Photo of the Day - 12th Apr 2024
TUK-GK9Melonite NiTe2 , Altaite PbTe , Quartz SiO2
Slide Mine, Gold Hill Mining District, Boulder County, Colorado, USAField of View: 0.2 mm
The quaint melonite table board (pink) formed by a euhedral single crystal in altaite (bright) filling interstices in quartz (dark gray to almost black). Vertically reflected, plane polarized light digital image in air.
G. Grundmann collection and photo.
Ore microscopy illuminates the darkness of the opaque "grey ugly" with true reflectance colors!
Mindat.org Photo of the Day - 11th Apr 2024
L6M-G5XMelanophlogite 46SiO2·6(N2,CO2)·2(CH4,N2) , Magnesite MgCO3
Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, ItalyField of View: 4 mm
Hyaline sphere of melanophlogite arranged in a very elegant manner on a sheet of magnesite. This position makes the sphere very elegant and accentuates its transparency and dewdrop appearance.
Photographed with biological microscope Zeiss, objective luminar 63mm Zeiss, duplicator 1.6X, APN Sony alpha6000.
Mindat.org Photo of the Day - 10th Apr 2024
Geological Museum of Lisbon
Misericórdia, Lisbon, Lisbon, PortugalA view from the paleontology room. In the center, one can observe a significant alignment of vertebrae of a Lourinhasaurus, an herbivorous sauropod dinosaur genus dating from Late Jurassic strata of the Estremadura region. Its name origin is due to the discovery of a partial skeleton, including a tooth and a hundred gastroliths, in coeval strata near the town of Lourinhã.
Rui Nunes' photo, March 2024.
Mindat.org Photo of the Day - 9th Apr 2024
PR2-H7YStrontioruizite Sr2Mn3+2Si4O11(OH)4·2H2O , Sugilite KNa2Fe3+2Li3[Si12O30]
Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South AfricaField of View: 0.8 mm
Strontioruizite on sugilite.
Raman and EDS analyzed (7.56% Mn, 6.94% Sr, 18.28% Si).
Stacked from 48 images. Method=B.
Mindat.org Photo of the Day - 8th Apr 2024
GN4-FKMFriedelite Mn2+8Si6O15(OH,Cl)10
Franklin Mine, Franklin, Sussex County, New Jersey, USAField of View: 3 cm
Exceptional crystals of orange friedelite.
Mindat.org Photo of the Day - 7th Apr 2024










