Magnetite

Australasia Australia Victoria

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 ilmenite as flat crystals. Magnetite as tetrahedrons. Colourless tiny tabular sanidine crystals. Brown pseudohexagonal biotite....

  • March 9, 2025
Australasia New Zealand

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...

  • July 1, 2024
Arkansas North and Central Americas United States

5805 A2980 523marps Fluorite, Chlorite, Magnetite, Albite, Pyrophanite, Natrolite(?), Big Rock Quarry (3M Quarry), Little Rock, Pulaski County, Arkansas, USA

Tiny purple octahedral fluorite crystalson albite with greenish chlorite, white prismatic crystals of natrolite(?), colourless quartz, and brown pyrophanite. Also on specimen magnetite, Ex Art Smith Collection (collected in 1979). Width of view 11.5mm. Stack of 57 images. Click on the image below for a higher resolution version. When I...

  • January 28, 2023

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