1661 Libethenite, Estremoz, Évora, Portugal

Sharp green pseudo-octahedral crystals on quartz. Width of view 3mm. Stack of 120 images. Labelled as “Estremoz, Évora, Portugal”. Other such specimens on Mindat are tagged with “Uncertain locality”. The locality Miguel Vacas Mine, Nossa...

ncat RD Diopside, Fluorapatite, Nepheline, Ilmenite, Magnetite, Leucite, Sanidine, Biotite, Clinopyroxene, Cosgrove quarry, Cosgrove, City of Greater Shepparton, Victoria

(Photo) Leucite as grey-white material in groundmass (“leucitite”). Elsewhere on specimen: Green prismatic diopside. Brown-black prismatic clinopyroxene. Nepheline as hexagonal prisms. Nepheline with hollow cores have been altered to analcime. Colourless needles of fluorapatite. Grey...

5575 Lead, Laumontite, Southern operations mine (Pasminco mine; Perilya mine; Consolidated Zinc Mine; CRA mine; New Broken Hill Consolidated Mine; NBHC Mine), Broken Hill, Broken Hill district, Yancowinna Co., New South Wales

From Level 16, NBHC. See https://rruff.info/uploads/CM46_73.pdf. Laumontite fluoresces blue under LWUV. Laumontite photo: First image: Width of view 6mm. Stack of 80 images. Second image: Width of view 9mm. Stack of 60 images. Click on...

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 Vallée-du-Richelieu RCM, Montérégie, Québec, 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...