Heterastridium conglobatum (Reuss, 1854)
 Era: Mesozoic
 Period: Upper Triassic (237 - 201.4 Ma)
 Origin: Timor, Nusa Tenggara province (Indonesia)
 Coordinates: 8° 34' 22'' South, 125° 24' 35'' East
 Measurements: 32 x 32 mm / 1.26" x 1.26"
 Weight: 43g/0.094lb
 Description: 100% natural fossil hydrozoan, doesn't have repairs or paint.
 Heterastridium is an extinct genus of marine hydrozoan. It is the only genus accepted in the monotypic family Heterastridiidae. The fossils date from the Upper Triassic. They are mostly discoid or spherical and some shapes found in the Karakorum Mountains are called Karakorum stones. They vary in diameter from 1 to 35 cm and seem to follow Cope's rule for the prehistoric climate. The material from this site is very difficult to obtain on the market.

This piece will travel insured in a safety package to arrive in perfect condition.