Pecten jacobaeus "WITH SANTIAGO-CROSS" (aka Santiago de Compostela shell) called pendant on rope.
Bakari stone (Tseseniet) from Karas, Namibia (very rare)
Gargariscus prioonocephalus ("brown-red") from Vietnam (very rare!)
This fish is very special and experts on fish at American Museum were surprised when seeing its photos and gave to me the correct name after some days of identifications.
Gargariscus prionocephalus also known as the Jaggedhead gurnard is a species of armored searobin native to the eastern Indian Ocean and the western Pacific Ocean. This species is a deep-water species found down to 304 m (997 ft) on the continental shelf. This species grows to a length of 30 cm (12 in). It is the only known member of its genus.