A very rich transparent green that develops faint wispy blue under strong oxidizing flame. Neutral flame to surface colour tends to opacify while interior colour surfaces develop a range of colours from tan to blue. Careful not to reduce, it will give an opaque red to exposed surfaces.
This rod is of Green Envy, made by Momka Glass in Washington state USA as a borosilicate glass rod. Each rod will vary between 5-7mm dia and will be 20" (510mm) long.