Structure of wood in concretion; which also contains a glass shard; from the wreck of the East-Indian navigator 't Vliegend Hart; who died in 1735. The concretion encloses a large; greenish glass fragment. Moreover; the concretion is against wood; because on one side you can clearly see wood structure. Filled with rubber. Concretion; Dutch East India Company; 't Vliegend Hart (ship); c. 1700 - c. 1735; glass; concretionary stone; wood (plant material); rubber (material); h 7.8 cm x w 8.2 cm x d 5.5 cm x w 240 gr