Siderite

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 to thomasclarkite and elpidite. Identified by mineralogist Dr. Ian Graham. Click on the images for...

ncat JR2 G0W-NPG Magnetite, Chlorite, Siderite, Chabazite-Na, Orthoclase, Apatite, Bickers Quarry (Simpkins Quarry), Tokatoka, Kaipara District, Northland Region, North Island, New Zealand

Black magnetite octahedra, some with traces of chlorite on their faces. Some magnetite crystals are completely encased in chlorite. Blocky orthoclase crystals form part of the cavity lining. Brown sheaf or club-shaped siderite, yellow hexagonal chabazite-Na, and needles of apatite coated with chlorite. Width of view 6mm. Stack of 70...