Why this rock is probably not a meteorite:
This one is a puzzler. The rock has a glassy coating on the right
side that resembles a meteorite fusion
crust.
However, on a meteorite of this irregular shape, we'd expect the
fusion crust to coat more than just one side. Also, on an oriented
stone,
we would expect to see signs that the ablation glass flowed from
the leading side to the trailing side, but there's little hint
of flow here.
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What is it?
It might be a meteorite, but we suspect not. The rock was found 3
meters deep at a construction site in Singapore. If it's not a meteorite,
we don't know what caused the apparent coating.
Addendum: Someone contacted me suggesting that the coating might
be pyrobitumen.
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