Clump of two Dutch ducatoon "biscuits" (completely cocooned in encrustation). 87 grams total, roughly 2-3/4" x 2". Two large, round coins that are thickly oxidized ("biscuitized") by the ocean's corrosive effects combined with sandy accretion, no details visible but the coins presumably solid (by weight), mostly dark gray with a tinge of green but with a few small bits of bright white shells plus a tiny glass shard. Recovered from: Vliegenthart, sunk in 1735 off Zeeland, Netherlands
Estimate: $300-450