Here's an early pressed glass clambroth Petal and Loop candlestick made at the famous Boston & Sandwich Glass Co in the 1840s or 1850s

It was hand pressed in mold with rough pontil scar up inside bottom with crude glass wafer construction joining the base to top half of candlestick....a 6 petal socket...7 loop hollow base..semi opaque clambroth glass.

7 inches high, 4" diameter base, 2 1/5" diameter top