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Solid colored cores often have strands on their surface, either straight or twisted around the core.
The core may be cylindrical or it may have lobes, and it may either be transparent or opaque.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.For a much more thorough description of the history of hand made glass marbles, please visit my History of Glass Making in Lauscha, Germany page.Transparent Swirls can be found in size from 7/16" to well over two inches, though some are more restricted in their size range. Several factors can increase the collectibility and therefore the value of Transparent Swirls.
Latticinio Swirls possess cores comprised of colored strands that are usually twisted into a lattice-shaped appearance.