Aluco Vertagus Seashells in Bulk, Cerithium Aluco, a sea snail found in the Indo Pacific oceans sold in 2 kilo bags (4.4 pounds).  These shells will measure between approximately 1-1/2 and 2-1/2 inches in length.  The shells vary in color from dark gray to lighter grays and some have areas of white.  They have spiral ridges with small nubs.  These shells are commercial grade and the bags will have some shells with tiny holes or damaged points.  Also there will be some sand in the bottom of the bags and a little gravel.