Not to sure on the melting test. But it looks like a white powder. Have you seen cocaine? Well kinda like that but not as cyrstally or grainy. It also looks like much less that you would expect per volume.
It all depends on your source bro. If you get it from the right people you have no worries. If its from a fly-by-night, you should lie in bed at night in a cold sweat wondering if its Var you have. lol.