Vintage Sponges Specimen

We have acquired a nice vintage collection of specimens that are beautiful and strange to look at. Each block has nice identification placards and has a nice amber color due to age with scuffs and wear from many years of use in the classroom. Remember when Damien Hirst lined these up on a shelf and sold it for a couple million? Well--this is like that but without having to dig that deep. You know art is nature and nature is art. Something like that. Sponges measure: 5" x 3 5/8" x 3/4"