nonamethanks said:
Are golden apple and silver apple in fate visually distinct from generic golden/silver apples from different copyrights? If no, then we don't really need a separate tag just for them.
No, they're not visually distinct. I don't recall seeing silver-colored apples elsewhere unless I were to do a deep search of different-colored apples and tag them. As far as golden fruit are concerned, they are no different in appearance than generic gold-colored apples. The trouble is that they're considered a gameplay mechanic in Fate/Grand Order, so taggers may treat them as such.
Here's what they look like: