1. Nothing jumps out as being fake but I would ask for more pictures to be sure
2. I would like to see the back of the pendant but so far, it looks good
3. Looks authentic to me
4. Need more pictures, close up’s are important for this piece, the photo posted does not allow me to really get a good view of the pendant
5. Authentic.
I used to work for Tiffany’s in the early 1990’s and speak from experience. As a side note, never consider the pouch, box or care card as a factor in deciding fake/real. Some of the items above show authentic packaging but without a close up (not saying the items above are fake but if you don’t get close up photo’s, do not consider the box/pouch/ribbon/card as a factor ) I would never authenticate something based on the package. Many counterfeiters will photograph a fake with real packing, hoping that it makes the fake look more ‘real’. The only reason I typed all of this out is because some of those listings show a authentic pouch and box, but it’s the close up photos that are important.