I follow the youtuber geologist GneissName on patreon, and he sent out some ore samples. The green one is malachite, the gold/blue/purple one is chalcopyrite. They're very pretty!
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I follow the youtuber geologist GneissName on patreon, and he sent out some ore samples. The green one is malachite, the gold/blue/purple one is chalcopyrite. They're very pretty!
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Chalcopyrite (CuFeS₂) is the most important copper ore on earth, and also the most likely sulfide to get mistaken for gold — but under a loupe it gives itself away. Pyrite forms sharp cubes; chalcopyrite forms these rounded, brassy blobs that slowly tarnish into rainbow iridescence as the surface oxidizes. This cluster from Jiangxi sits on a bed of drusy quartz, which is a common association — both minerals precipitate from hot hydrothermal fluids moving through fractures, just at slightly different points in the cooling sequence.
Chalcopyrite on Covellite, Summitville Mine, Colorado USA. Sold
@pickledfingers (Raw chalcopyrite data)
Our most recent synthesis batch! 101, and 104 were doped with silver.
100 still seems to have made cubanite and some variants even though our XRD results came back as tetragonal Cpy. For both 101 and 104 though, we either got cubanite (Ag included) or Nukundamite (no trace Ag) and for both, it partitioned to the bornite of the samples.
(Graph ends are for Cu-Fe-S wt%.)
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Gold gem presentation system terms
plain text: Gold gem presentation system terms :End pt
gold quartz | Chalcopyrite
Gold quartz: An individual who presents their identity through the colors gold and white.
Chalcopyrite: An individual who presents their identity through the colors gold and black.
Coined for day 2 (a term related to nature / space in some way) for @chronicallyqueercoining2's event!
Mentions / Tags: @chroma-jewler, @radiomogai, @liomogai
Banner transcript: This term was made by an Endogenic. Anyone can use it however (So don't repost or recoin, ask before adding to wikis) :End Transcript
Written flag ids under the cut, same as alt text
Matildite on Chalcopyrite in matrix
Locality: Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany
Tiny, octahedral crystal of silver-coloured, metallic Matildite mounted on a larger crystal of brassy Chalcopyrite in a milky white Calcite matrix.