Subheading 251511: Marble and Travertine; Having a Specific Gravity of 2.5 or more, … etc.
Subheading 251512: Marble and Travertine; Merely Cut, by Sawing or otherwise, into Blocks or … etc.
Subheading 251520: Ecaussine and other Calcareous Monumental or Building Stone; Alabaster, … etc.