Greenish tinted crystals of marcasite with fluorescent sphalerite. Width of view 14mm. Stack of 50 images. Click on the image below for a higher resolution version.
A marcasite nodule that is unaltered (compare specimen 0189). Width of view 14mm. Stack of 45 images. Click on the image below for a higher resolution version.
A crystalline nodule of marcasite. Ex Barry Schubert. Width of view 14mm. Stack of 85 images. Click on the image below for a higher resolution version.
What was once a very nice sharp nodule of crystalline marcasite is now mostly sulphate minerals, possibly colourless gypsum, white fibres of halotrichite, and pink rozenite amongst others. Width of view 14mm. Stack of 35 images. Exact location not known but possibly Addiscot Beach at the top of the Angahook...
Specimen has some beginning signs of “pyrite disease”. Apart from the pyrite and marcasite, there are a few small crystals of spessartine and fluorapatite. Ex James Melville Collection. Width of view 10mm. Stack of 30 images. Click on the image below for a higher resolution version.
Two groups of marcasite crystals with orange dolomite. Ex Joan Lamond Collection. Acquired by Joan from Frank Robinson in 1990. Width of view 10mm. Stack of 45 images. Click on the image for a higher resolution version.
Purple cubes with small modified edges with tiny brassy marcasite crystals. Some of the matrix is vein calcite that fluoresces bright red. Width of view 9mm. Stack of 130 images.
Pyrite after marcasite, with calcite and a second generation of pyrite. The calcite is fluorescent pink under longwave UV. Video best viewed full screen.
Inclusions of pyrite and marcasite. From the Wise Lake Formation. Ex Jared Freiburg, Saga Minerals. Acquired at Tucson in 2011. And here is Jared with one of his cases in 2011 at the Hotel Tucson City Center (aka Innsuites), and a close up of my specimen’s big brother!
ex Bernie and Margaret Day Collection
Joan Lamond Micro Collection 2006
More likely pyrite
