Privy Lamp. Nice color, hard to say exactly what color you would label it. Looks rose color. The pontil scar is typical of lamps dating to the civil war period. The sheared top is very common as well. Since you were going to put a metal lamp part on top there was no need to polish or grind it down. Ground lip finishes were made on several types of bottles dating to 1870 or so. This would include spice jars, masons and numerous utility bottles. As far as value goes, hard to say. If there was the actual lamp parts then I would venture $30 to $70. Without, much less. Although the color is whats nice and that is what people pay for. Regards, jgas