I saw it today in the Tokyo national museum. It was a gigantic sword that looks like a blue green claymore in the Egyptian exhibit. I can't speak Japanese, so I can't ask the curators.
Sorry no pics. It just looks very odd to me.
A blue-greenish color is definitely possibly/likely as Egyptians made swords out of bronze or copper before switching to iron, both of which turn green with time. Here's an example of a bronze khopesh with a green patina. They also had straight swords though.
The longest Egyptian swords I've heard of were still like 2 - 2.5 feet, while claymores are like 3 to 4. Would you say it was that big?
I am betting that OP didn't see it in an Egyptian exhibit, but in an Aegean Bronze Age exhibit. What he saw was probably a Mycenaean "rapier."
According to the web site of the Tokyo national museum, the the Egyptian section also includes West Asian artifacts, including Sumerian, Parthian and medieval Persian (and is quite close to a section on India). Are you sure it was labelled as Egyptian?
Can you give us some sense of, "Gigantic?"
How long is it, does the blade have a curve, ect.
Do you know for a fact that it's Egyptian? When you say it was blue / green really all that tells us is that it is most likely copper and / or bronze- that's the color they turn as they corrode, but when you think of Egyptian swords you typically think of the khopesh.
