u/New_Avocado7325

Image 1 — Light non-magnetic object found in ocean. ~4cm long. Black shell over white body, interior has green and copper-colored layered rows in a curved pattern.
Image 2 — Light non-magnetic object found in ocean. ~4cm long. Black shell over white body, interior has green and copper-colored layered rows in a curved pattern.
Image 3 — Light non-magnetic object found in ocean. ~4cm long. Black shell over white body, interior has green and copper-colored layered rows in a curved pattern.
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Light non-magnetic object found in ocean. ~4cm long. Black shell over white body, interior has green and copper-colored layered rows in a curved pattern.

Found in the sea at Porto Ercole, Italy. Looking for an ID of what it originally was.

Oblong, roughly 4cm long and under 2cm wide, very light, non-magnetic. The outside is smooth and feels like stone. There’s a black outer shell, then a white layer beneath it. The structure is layered and curved. Features I can make out:

- Rows of small rectangular “teeth” in dark and light green, arranged in a curve/circular pattern rather than in flat planes around unknown core.
- A layer of wires that run across the width (not lengthwise), sitting inside the curve of the green teeth. Color of wires and color of oxidation looks like copper.
- Two wire-ends fully encased in the light-green material.
- A layer of green over the copper that connects to and feels like the same light-green as the teeth
- On one end, a curved bank of parallel ribs where original material was.

u/New_Avocado7325 — 3 hours ago