I don't know alot about SPS corals yet, lol that being said, I would think the first pic after you bought the coral is what the coral should be looking like and it seems by the latest pic that the corals is losing color. Are you worried that the coral isn't doing good, or is this normal?
Looks like there's a bit of rainbow colour showing at the base.
Looks like it is showing nice growth. How does the color in the pic match with the true color? Are you happy with it?
nice growth what are you using to glue that coral it looks pink