Welcome to Treasurenet Medhi,
Doesnt appear to be treasure related, this object looks more utilitarian in nature, like part of a column, or grinding stone, perhaps..
the circle with a dot, is probably what you were thinking of..and yes that was used originally as the symbol of the Sun. later other cultures used the sun sign to mean gold...ie in the days of Alchemy, it meant Sol or Gold...this was not used by the modern codemakers as a sign for gold. [spanish or jesuit]
hope this helps
rangler