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Umbite from Koashva Open Pit, Koashva Mt, Murmansk Oblast, Russia
C8A-URHUmbite K2(Zr,Ti)Si3O9·H2O
umbite 2mm crystal
photo & collection S.Broetto
EJN-2HUUmbite K2(Zr,Ti)Si3O9·H2O
Largest Crystal Size: 1.2 mm
Aggregates of crystals flattened on {010}, striated, with easy cleavage and micaceous appearance, from transparent to white. Ex Paolo Bosio collection and, now, in the collection of Gianfranco Ciccolini, author of the photo.
97N-WL7Umbite K2(Zr,Ti)Si3O9·H2O , Aegirine NaFe3+Si2O6
Dimensions: 0.8 mm x 0.8 mm x 0.2 mm
Largest Crystal Size: 0.8 mm
A semitransparent, platy hexagonal aggregate of umbite associated with dark green, prismatic aegirine crystals. Koashva open apatite-nepheline ore pit, Khibiny alkaline massif, Kola Peninsula.
XEL-CQHUmbite K2(Zr,Ti)Si3O9·H2O , Aegirine NaFe3+Si2O6
Dimensions: 40 mm x 40 mm x 20 mm
Largest Crystal Size: 1 mm
Crystal aggregates of umbite lining cavities in a dense aegirine matrix, formed by the dissolution of primary eudialyte-group minerals.
VQ7-8G6Umbite K2(Zr,Ti)Si3O9·H2O
Dimensions: 50 mm x 30 mm x 10 mm
Largest Crystal Size: 0.2 mm
Aggregates of colorless transparent, platy umbite crystals lining vugs formed by hydrothermal leaching of eudialyte along a fault zone in the hanging wall of an apatite–nepheline ore body. Koashva open pit, Khibiny Alkaline Massif, Kola Peninsula, Russia.
0MC-073Umbite K2(Zr,Ti)Si3O9·H2O
colourless group of crystals of Umbite
dimension area mm. 2,6 x 2,6
photo Germano Fretti
collection Luigi Chiappino
AME-K9UUmbite K2(Zr,Ti)Si3O9·H2O , Aegirine NaFe3+Si2O6
Dimensions: 40 mm x 30 mm x 20 mm
Largest Crystal Size: 1 mm
Cavities formed by postmagmatic alteration and leaching of primary eudialyte, filled with pearly white aggregates of umbite. The matrix consists of densely intergrown, dark green, fine prismatic aegirine crystals. Koashva open-pit apatite-nepheline mine, Khibiny Alkaline Massif, Kola Peninsula, Russia.
H7P-J38Umbite K2(Zr,Ti)Si3O9·H2O
Dimensions: 65 mm x 50 mm x 25 mm
Largest Crystal Size: 0.25 mm
Parallel-grown aggregates of well-formed, semitransparent umbite crystals associated with a complex hydrothermal assemblage resulting from the alteration and leaching of primary eudialyte-group minerals. Koashva Open Pit, Khibiny alkaline massif, Kola Peninsula, Russia.
N4R-G65Umbite K2(Zr,Ti)Si3O9·H2O
Colorless aggregated blades. Width of field is 1.8mm. Collection and photo Jesse Crawford. Nikon D-100 digital camera using a Leitz 5.6x ELWD objective and Olympus 2.5x NPK projective ocular on a Zeiss standard microscope frame. I use a Nikon UFX-II controller modified for use with the Nikon digital camera body.
QK1-R4LUmbite K2(Zr,Ti)Si3O9·H2O
Field of View: 9 mm
Platy crystals of Umbite to 1 mm in a cavity formed after Eidialyte from Mnt. Koashva, Khibiny, Kola, Russia. Specimen and photo: Knut Eldjarn.