Opalescent Glass Oil Lamp Shade and Base

This item appears to be an antique or vintage oil lamp, characterized by its distinctive opalescent glass construction, which transitions in color. The lamp is composed of two main sections: a large, spherical shade sitting atop a smaller, rounded base. Both sections exhibit a vibrant color gradient, starting with a deep, rich cranberry or ruby red at the top and bottom, which smoothly transitions to an amber or yellowish-orange hue towards the middle. This color blend suggests a heat-sensitive opalescent glass, possibly 'cranberry opalescent' or an 'amberina' style, which were popular during the late 19th and early 20th centuries. The spherical shade features a wide, presumably open, neck at the top for venting and a slightly narrower opening at the bottom designed to fit onto the base. The base itself has a classical, somewhat ornate shape, appearing to be composed of two stacked rounded forms with a discernible ridge or collar between them, where the shade would rest. The glass surface appears smooth and glossy, with no immediately visible chips, cracks, or significant abrasions from the provided image. The lamp's construction suggests it once housed a wick and burner mechanism, though these components are not visible in the image. There are no obvious maker's marks or signatures discernible. The overall style points to a Victorian or Edwardian era aesthetic, commonly found in decorative home lighting of that period. The quality of the glass, particularly the consistent color transition and lack of visible defects, indicates good craftsmanship. The piece is currently positioned on a dark wooden surface, possibly a corner table, against a light-colored wall, highlighting its warm glow.