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At least 2 metric tons of material comprising thousands of individuals has been sold under the name NWA 869 in the market places of Morocco and around the world
Erythrite or red cobalt is a secondary hydrated cobalt arsenate mineral with the formula (Co3(AsO4)2·8H2O)
Marx & Uhen 2010)
Mosasauridae) from the Maastrichtian of Angola
with three pairs of curved projections bearing marginal spines
30109- Eocene 7.09 Inch Palaeoperca proxima Fossil Fish - Messel Shale Turtle At least 2 metric tonsPalaeoperca, Micklich 1978 (perch like fish) Osteichthyes Perciformes It was prepared using a classic resin transfer process. Since the oil shales the fossils at Messel are filled with water they would disintegrate if allowed to dry out. The fossils are coated in a layer of resin to create an artificial matrix and then all of the shale is removed from the other side. This leaves the fossil embedded in a plate of hardened resin.