Hi - can anyone tell me what this piece of glass is which I found recently. It is bell shaped but the bell bit is shallower than a normal bell and there is no indication that there has ever been a clapper attached. It seems to be hand blown and to have some age to it, 19th century?. The base where it sits is ground and rough to the touch. Its a dark turquoise colour. Could it be to snuff out a candle? Its 4 inches high and diameter 3.5 inches. Many thanks, Ashley