Sue is correct in her assessment. Candlesticks with metal tops were made in limited quantities as part of the normal production range. We have one in the museum collection, but we went to a seller in the USA to acquire it. The more common candlesticks are made entirely of glass. We have more of these, in various ranges. I attach pictures of both forms for reference. (Sorry about the poor pictures. It was the best I could do at short notice.)
Anton