CLAMBROTHS

Clambroths are an opaque, semi-opaque, or translucent type of swirl that has colored strands (most often pink) on the surface. The strands are usually equidistantly spaced and are typically all of the same color, though examples with two, three, or even more colors are found. The base is almost always white and often composed of a soft glass that is subject to chipping and bruising. However, Clambroths sometimes have a colored base, and the most common of these are opaque pale blue or translucent dark purple.

The number of strands on the surface is usually between eight and 18. Some have more than 18 and this often results in the strands being very closely spaced. These are known as "Caged" Clambroths. On occasion, there will be a thin layer of clear glass over the strands; such marbles are considered "Cased."