Of course, Phoenix tears have healing powers.

you can see every single feather and scale on Fawks

next time somebody tells me that Harry Potter has rubbish visual effects I will show them this

That’s because this effect isn’t “VISUAL”, it’s “PRACTICAL.” Visual effects are those created by a computer. Practical effects are those effects that are created physically on set and/or in-camera, like this puppet. 

Practical effects are almost always better.