I can add an old tip as well.
If you're going for reflections like this, there are 3 ways to do it.
1. A mirror.
2. Glass with background (basically a mirror)
3. A reflective surface.
The advantage of a mirror, is that you'll get a very clear reflection. The same goes for the two others really. Now both 1 and 2 have one slight drawback. Since you're placing whatever you're taking a picture of, on the surface you're going to get two reflections, one on the surface of the glass, and one from the background you've got the glass on.
Most of the time those two reflections will be so close, you can't really tell them apart. (this is also why a thin mirror is better then a thick one)
The commonly percieved effect, is that the edges of the reflection is more blury then the object itself.
This is why it is better to use just a reflective surface, like a black, glossy tile.
Hope that was informative, if not helpful
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