Dotted agate, spotted agate, eyed agate, etc
Dotted agate 1, spotted agate 2, eyed agate 3, 4, 5, agate 6. Agata punteggiata, Agata macchiata, Agata occhiuta, Agata. Handcoloured copperplate stipple engraving from Antoine Laurent de Jussieus
Jewel box clam, embossed horn, miter, volute
Various shells: Jewel box clam, Chama squamata 1, embossed horn shell, 2, miter, Mitra mitra (Mitra episcopalis) 3, volute sea snail, Voluta musicalis 4, agate volute 5, groene zilvermond 6