Blenko produced a small candle vase which could either be used as a vase, or a candle holder. This piece appears to be a much larger version of that vase, in Emerald Green crackle glass. I do believe that it is also a Blenko piece.
This vase measures 6.5" in height and 5" in diameter.
In excellent condition it has no chips, nicks or cracks at all.