20130 Niobium

Niobium metal. Width of view 4.5mm. Click on the image below for a higher resolution version.

ncat VHD15 Thomasclarkite-(Y), Molybdenite, Elpidite, Siderite, Aegirine, Sodalite, Albite, Poudrette quarry, Mont Saint-Hilaire, La VallƩe-du-Richelieu RCM, MontƩrƩgie, QuƩbec, Canada

Greyish-green prismatic spray of crystals of elpidite (green fluorescence), pale yellow tabular thomasclarkite, silver hexagonal molybdenite, tiny brown siderite, green prismatic aegirine, and sodalite (orange fluorescence), in white albite (pink fluorescence). A yellow arrow points...

ncat AA5 Alfredopetrovite, Ahlfeldite, Penroseite, Chalcomenite, FelsőbĆ”nyaite, El DragĆ³n mine, Porco Municipality, Antonio Quijarro Province, PotosĆ­, Bolivia

Type Locality for alfredopetrovite. White balls with a greenish-grey tint of alfredopetrovite, minor pink Co-bearing ahlfeldite, minor light blue chalcomenite(?), minor silver penroseite, white patches of felsőbĆ”nyaite, and thin colourless blades and colourless blocky crystals...