Foam glass in blocks, panels, sheets, or similar forms specifically for construction insulation is classified under heading 7016, not under the mineral wool or other insulation headings. The glass-based composition and the pressed/molded form are the distinguishing factors.

Glass mosaic tesserae and smallwares classify under 7016 (specifically 701610) based on their glass composition. Ceramic or porcelain mosaic tiles, regardless of their decorative finish, classify under the ceramic tile headings. The material — glass versus fired ceramic — is the primary classification criterion, and importers should obtain material composition documentation to support the correct heading.