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Campo del Cielo 395.6g "The Snake"
The first find of Campo del Cielo was in 1576 in Campo del Cielo Argentina. Pieces of this meteorite are still being discovered today. It is a polycrystalline coarse octahedrite with many nice large regmaglypts [thumbprints] and a slightly rusty black fusion crust.
It's chemical makeup is below;
- Kamacite--an iron nickel alloy which makes up about 90 percent of specimens in finger size and width crystals. Neumann bands are common.
- Taenite and plessite, the other iron-nickel alloy constituents are found at grain boundaries.
- Troilite is found aggregates with graphite and silicates.
- Schreibersite is uncommon.
When I first got this piece it was shiny black all over. It soon began to scale off in thin pieces and so I undertook a preservation effort. I first soaked it in a rust remover for 24 hours. Then, while in a bath of distilled water I brushed it with a brass brush. To my dismay almost the whole surface came off in scales showing the rust beneath. I oven dried the piece at 200 degrees for two hours and returned it to the rust remover bath for a second 24 hours. Then I again used a brass brush to remove as much of the rust as possible. Then I bathed it in distilled water, brushing again to remove all tracews of rust remover. Then I bathed it in 96% alcohol again for 24 hours and oven-baked at 200 degrees for two hours. The final finish was with vaseline and it has been stable since.
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