Latticinio Swirls are the most common type of hand made glass marble.
I have found the marble information and condensed this on one page.Alan Basinet is the author to all the pictures and information below.Now and then the strands will be divided, typically into three different sets.The color of the core is white, yellow, orange, red, green, and blue, in increasing order of rarity.Solid colored cores often have strands on their surface, either straight or twisted around the core.
Sometimes these strands "float" well above the core; in such cases the marble is considered "trilevel." The most common core colors are yellow and white when the core is solid colored; otherwise a wide variety of colored bands may comprise the core.
Single colored cores are usually cylindrical and are truly "solid," while multicolored cores are often comprised of tightly spaced bands.
On the latter type, the bands may be situated in such a manner as to give the appearance of lobes if the core is observed from above.
However, most have such an outer layer and this almost always consists of either single colored strands or multicolored bands.
The bands are most often of two different color schemes, alternating with one another (four and six bands are the rule though exceptions can occur), while the strands occur in sets, usually four, and may have two to five or more strands in each set.
One is whether or not there are alternating colors in the core, and another is the appearance of the core itself, specifically how well defined the lattice is.