Antique Italian Grand Tour Rome Micro Mosaic Plaque set in Heavy 14k Gold Clasp, Bracelet?

The River Arno landscape as subject, this large and fine mid-1800s Italian micro mosaic plaque mounted in its 14k gold mount (a complete clasp) comes from a rather large stash I bought as a Paris goldsmith’s estate was auctioned off. Everything from jeweler’s tools to unmounted stones, cameo, micro mosaics. Among those were sections of what must have once been a bracelet or perhaps even a necklace. I have 4, and they are listed separately. You see some of them in the final photos I’ve sold off a lot of others – those are the remainders I’d kept. You are buying just one – this oval black slate basin simple landscape including the River Arno near the Roman ruins.  Ready to make up into bespoke jewelry (is it Elizabethe Locke who has done some masterpieces with these at enormous prices?). Or just collect them as I have, as the small wondrous works of glass art they truly are. Each tiny colored glass tesserae worked into the onyx or black marble basin, filed smooth.  Full measurements noted on photos.

Very good to excellent condition for age and type. It has been salvaged with others from a Victorian bracelet, generous 14k gold mount, still with the links one could work with to create a bracelet or necklace with beads, pearls, or sections of same and the other 3 plaques which have the same gold mounts (sold separately), and remains in perfect condition. No losses, no raised tesserae, no chips, no cracks or hairlines. What might appear as imperfection on the bevels of the basin is optical illusion, glare or reflection from the gold, or dust particle. Small guard chain and entire 14k gold mount in excellent condition, as well.