Dating clay pipe bowls by angle
The base glass is almost always clear and colorless, though tinted glass is found infrequently in shades of blue, green, or even amber.
Some Latticinio Swirls are "naked," that is, lacking an outer design.
The colors are typically opaque, though translucent strands do occur, especially in white examples.
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.
(Below you will find marble information that was stored on Mr.
Alan Basinet's Marble Website during the late 90's to the mid 2000's.