#vlasovite

[mineralsandsomerocks]

Potassic-magnesio-fluoro-Arfvedsonite with Eudialyte, Vlasovite, and Fluorite (+/- Gittinsite)

Locality: Kipawa alkaline Complex, Sheffield Lake, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada

Black, glossy Potassic-magnesio-fluoro-Arfvedsonite in light pink Eudialyte matrix, associated with minor honey-yellow grains of Vlasovite, deep purple Fluorite, and potentially white, chalky Gittinsite associatied with the Vlasovite. *Gittinsite Type Locality*

[wigmund]

From Mindat.Org Photo Of The Day; April 5, 2018:

Vlasovite: Na2ZrSi4O11; Astrophyllite: K2NaFe2+7Ti2Si8O28(OH)4F

Locality: Água de Pau Volcano (Fogo Volcano), Água de Pau Massif, São Miguel Island, Azores District, Portugal

“To the center a good colourless crystal of vlasovite, to the left orange crystals of astrophyllite. Photo: Serge Lavarde; Collection: Luigi Chiappino”

[arockmaniac]

Eudialyte, Albite, Vlasovite, Gittinsite - Canada.  Under white light and short wave ultraviolet.  Eudialyte (Red/Pink Non-fluorescent), Albite (White; Red fluorescent), Vlasovite (Cream; Cream fluorescent), Gittinsite (White; White Fluorescent).  Each specimen is approximately 2" x 1" x 1".  

[ifuckingloveminerals]

Vlasovite, Gittinsite, Eudialyte, Agrellite, Albite

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada. Canadian Museum of Nature specimen# CMNMC85369

Visible

VLASOVITE - round gemmy yellow crystals to 2.9cm in diameter GITTINSITE - powdery white rind surrounding vlasovite EUDIALYTE - red matrix for vlasovite ALBITE - white bands at top and bottom of specimen AGRELLITE - grey patches at upper right and lower left of specimen, and thin veneer on left side

UV 1 (shortwave)

VLASOVITE - creamy yellow rounded crystals (there is some green in the dominant xl, likely from other fluorescent minerals) GITTINSITE - yellowish-green ring surrounding vlasovite EUDIALYTE - non fluorescent matrix for vlasovite ALBITE - dark red bands at top and bottom of specimen AGRELLITE - bright pink patches at upper right and lower left of specimen DISSEMINATED GREEN SPOTS - grains of either gittinsite, calcite, or Th bearing mineralization

UV 2 (longwave)

VLASOVITE - rounded crystal with very slight yellow fluorescence GITTINSITE - greenish white ring surrounding vlasovite EUDIALYTE - non fluorescent matrix for vlasovite ALBITE - greenish grey band at upper righttom of specimen (may be due to other fluorescent inclusions visible in SW photo, as this is not typical of albite) AGRELLITE - violet-pink patches at upper right and lower left of specimen

[ifuckingloveminerals]

Vlasovite, Gittinsite, Eudialyte, Agrellite, Albite

Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada. Canadian Museum of Nature specimen# CMNMC85369

Visible

VLASOVITE - round gemmy yellow crystal GITTINSITE - powdery white rind surrounding vlasovite EUDIALYTE - red matrix for vlasovite ALBITE - white band at upper right of specimen AGRELLITE - grayish patches in albite at upper right of specimen, and thin veneer on left side

UV 1 (shortwave)

VLASOVITE - greenish-yellow rounded crystal (vlasovite normally has more of a buttery yellow fluorescence, green is likely due to other minerals - see other crystal on full specimen) GITTINSITE - yellowish-green ring surrounding vlasovite EUDIALYTE - non fluorescent matrix for vlasovite ALBITE - dark red bands at upper right AGRELLITE - bright pink patches at right and thin veneer on left side of specimen DISSEMINATED GREEN SPOTS - grains of either gittinsite, calcite, or Th bearing mineralization

UV 2 (longwave)

VLASOVITE - rounded crystal with very slight yellow fluorescence GITTINSITE - greenish white ring surrounding vlasovite EUDIALYTE - non fluorescent matrix for vlasovite ALBITE - greenish grey band at upper righttom of specimen (may be due to other fluorescent inclusions visible in SW photo, as this is not typical of albite) AGRELLITE - violet-pink patches at upper right and thin veneer on left side of specimen