A vintage small decorative glass vase with a glossy black finish and a signature ruffled, crimped top edge. Fenton Art Glass Company, founded in 1905, became famous for its vibrant colored glassware. The company's 'black' glass, often referred to as black amethyst, was highly popular in the mid-20th century, created by using a dense concentration of coloring agents in the glass batch to achieve an opaque, ink-black appearance.