I'm having a hard time believing that this hilt material is amber in any form . I think we have all seen numerous examples of this type of hilt and from what I read from the links provided it just doesn't make sense that weapons hilted from this material (if amber) can sell for such a low price on the open market .
If this stuff really is amber (even reconstituted) I would expect to see color variations but all I have seen is the same general color and opaqueness in every example . Large chunk amber is quite expensive and molding bits and pieces seems to be a fairly complicated process which would IMO require a much higher price as a material .
Amber chunks :
http://www.ambericawest.com/chunks.html
Maybe it is this stuff which could be manufactured at a fairly simple level of technology :
http://www.ambericawest.com/make_amber.html