RIBBON LUTZ SWIRLS

Basically, a Ribbon Lutz Swirl is a Naked Ribbon Core Swirl with a wide, thick ribbon edged on both sides by "Lutz," or goldstone. The Lutz is usually flanked by narrow strands, usually white in color. They may have one or, less commonly, two ribbons, and the ribbons are opaque. The ribbons are either white covered with a transparent color or are themselves colored. If the marble has two ribbons, both are almost always the same color, though rarely two different colors occur. The base glass is most often clear, but on occasion color-based examples are found, and the ribbons in these are always white.