How can copper and silver create a rainbow of colors? Colloidal silver creates different sized nanotubes that reflect light at a variety of wavelengths. There's a lot of chemistry going on in these vases! In aqueous solution (and at room temp) their formation can actually be controlled to yield uniform colors. Not so much in glass and at 2000 degrees! Copper provides a reddish hue and somehow knows just where to go to create beautiful orange, peach and purple.
It's never ever the same! This vase is such a great example of what it can do and readily blended into shades of purple. It's a bit smaller at 5" high and 4 1/2" wide.