Cobalt glass with silver overlay. Mike Horine did not believe this candlestick was made by Cambridge in any color of glass. According to Rich Stoer, this candlestick is by Cambridge. "Although we have no documentation that the 200/4 was made in cobalt several dark blues were made by Cambridge from the teens to the thirties (the time frame this would belong to). Mosser did re-issue this in cobalt but to the best of my knowledge no one was applying silver overlay to them."
Pending further documentation, this candlestick is in the Unknown Candleholders category.