As Martin says, pics here would good.
Sounds like a mantel ornament (also called a "wig stand" by some folk) like the one shown below. Mine is 7.5 inch (19 cm) high and 3.5 inch (9 cm) diameter at the dome section. There is a flat (barely concave) polished area to the top but this seems to be a regular cleaning up after the pontil rod was removed following application of the stem and foot. The polished area is not of a shape or size that would easily accommodate a candle in the way the "saucer weights" can.