I find the subject of heraldry fascinating, have answered a couple of questions here on this topic, and would quite like to ask some of my own questions.
I'm not quite sure, however, what the guidelines are on when heraldry questions fit within the scope of the site. For example, on this question, there is the comment "This is a question about genealogical heraldry, not history".
When are heraldry questions on- or off-topic? The particular question I'd like to ask at the moment relates to a crest I found on a coat of arms on a gravestone - how it might be described and whether any other examples of such a crest exist - but I'd quite like a more general answer for the future. Do these questions fall under the "cultures and historical practices" umbrella, or are these questions perhaps more suitable on the Genealogy and Family History stack?