I am in possession of what I believe to be a huge chunk of carbonado, which after some research I believe is from space. I would love to have it tested but it is so hard that I cannot break or cut it at all, I cannot even scratch it. It is not magnetic. It weighs 248grams. I do not know how I go about getting it checked & tested.
My son found it laying on top of deep snow on top of a mountain in Afghanistan after a night of a major meteor shower.
I am attaching a few photo's, and I'm hoping that you can help me with my research of this and maybe help verify what it is exactly, or even maybe point me in the right direction where to get the information I require.
I truely hope that you can help.
Great find, very interesting!
The surface texture is suggestive of partial melting.
I'll let a meteorite expert reply more definitively, but meanwhile:
- determine its volume (use water displacement)
then calculate its density (using the mass you already know)
- you say it is not magnetic; please clarify: it does not attract a paper clip or it does not affect a compass needle brought close to it?
- by all means put it under UV light (in a dark room) to see if it fluoresces as Katja suggests; if it does so, note the colour and whether the whole stone glows or just particles in it
I'm not a meteorite expert either, but I've seen many suspected meteorites here in the AMC. Most of them turned out to be something else, and there is a number of things that may look like a meteorite.
Why do you think this one is from outer space? When meteorites fall from the sky, they don't just land nicely on top of deep snow and lay there to be found. You can test this by throwing it up in the air (assuming you do this on a patch of snow) and see what happens when it comes back.
I know carbonado is believed by some people as extraterrestrial in origin, but this has not been proven. In any case, this type of diamond has been found only in Brazil and the Central African Republic. It's on Wikipedia: http://en.wikipedia.org/wiki/Carbonado
Some meteorites contain carbon (see carbonaceous chondrite http://en.wikipedia.org/wiki/Carbonaceous_chondrite), but it is in small quantities, and it's organic. Your specimen doesn't look like that, or like any stony meteorite. It may look a bit like an iron meteorite, but since it's not attracted to a magnet, it is not one. In fact, all meteorites are attracted to a magnet, even if feebly. So it may be a big black diamond, but not from space.
I hope this helps.
If you found it in Afghanistan, which is no where near Brazil or the Central African Republic, you could find it's a bit of meteorite or what came of it more like.(look on this site and you will see what i mean http://www.museon.nl/en/node/2288) On the other hand it could be a Carbonado Black Dimond that someone dropped thinking its just a rock This may be a great find!
UV works on some diamonds and not on others..
Mohs on carbonado is 7 average to 14 laboratory made.
Get dry weight, then get a container you can immerse the stone completely in suspended by a string without touching the sides or bottom of the container. ( water must be purified!)
Zero your scale with the water and container on it. Now immerse your stone completely without touching the bottom or sides of the container.
Get the weight reading.
Divide dry weight by your new weight and you will have the specific gravity of the stone.
Now look online to see what specific gravity matches your find.
Carbonado is about 3.2-3.8?
Its sure looks like the real deal.