Vintage Manganese Glass Scalloped Ribbed Bowl

This is a circular clear glass bowl featuring a distinct scalloped or 'flower-form' rim with eight gentle peaks. The body of the bowl is characterized by pressed radial ribs or 'optic' lines that emanate from the circular base toward the wavy rim, creating a textured exterior and a smooth interior. Based on the user's observation that the glass glows green under 365nm UV light, the material is identified as manganese glass rather than uranium glass (which would glow brighter under 395nm). This interaction suggests a manufacturing date in the mid-20th century, likely between the 1930s and 1950s, when manganese was frequently used as a clarifying agent to neutralize the natural green tint of iron impurities in glass. The bowl appears to be pressed glass, exhibiting a sturdy thickness and uniform pattern. Physically, it remains in good vintage condition with clear transparency; a small orange price tag is visible on the inner rim, but no major chips or cracks are apparent in the overhead view. The style is consistent with Depression-era or early Mid-Century Modern kitchenware, often produced by American companies like Federal Glass or Anchor Hocking. The scalloped edges and textured ribbing provide both decorative appeal and a better grip for functional use as a fruit or serving bowl.