Thread:Shabook/@comment-33907244-20180313104010/@comment-31763893-20180315134151

In my opinion, the Infinity Stones are gathered in one article because they are part of a definite set which is clearly identified (in-universe), the artifacts share a common "origin" and "purpose".

The Monoliths have different purposes (we do not even know what they Grey Monolith's function was) and possibly different origins (the Maveth Monolith was built by the Kree, Flint built one White Monolith, and we have no idea who built the Black and Grey). Thus, despite all being Monoliths, there is no particular reason to group them in a single article.