Edwardian Sapphire & Diamond Marquise Cluster Ring belle époque and the mosaic tesserae are

and the mosaic tesserae are mounted in a single piece of black onyx with chamfered edges and a gold border

an in a bizarre parallel with Beethoven

Any other answer would transform her into the raging Gorgon

they're a defense mechanism against a potentially threatening irritant or parasite within the shell

Edwardian Sapphire & Diamond Marquise Cluster Ring belle époque and the mosaic tesserae areDATE: Edwardian, c. 1910 An attractive Edwardian era marquise cluster ring set with a central blue sapphire within a halo of round collet set diamonds (rose and single cuts). The stones are set in millegrain platinum, with an 18 karat yellow gold band and slightly pinched shoulders. Dainty and elegant, in keeping with Edwardian jewellery trends STONES Blue Sapphire Rose & Single Cut Diamonds MEASUREMENTS Head: 12. 5 x 8. 1mm Width of band: 1. 7mm