Natural History - Mastodon Bone Face Carving

Comprising three irregular pieces with one polished face showing the contrasting white veining. 209 grams total, 8.2-10 cm



Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).

A near complete Charonosaurus sp. hadrosaur egg, retaining the leathery surface, and possibly showing the internal remains at one corner. 1.73 kg, 14.1 cm



From Xixia Basin, Henan Province, China. Ex Eons Ago, USA, circa 2008. Prepared by Christine Coyle, U.S.A. From the private collection of Mr A Hills, Kent, UK.

Dinosaur eggs are known from about 200 sites around the world, the majority in Asia and mostly in terrestrial (non-marine) rocks of the Cretaceous Period. It may be that thick calcite eggshells evolved during the Cretaceous (145 to 65 million years ago). Most dinosaur eggs have one of two forms of eggshell that are distinct from the shells of related modern animal groups, such as turtles or birds; however, some eggs closely resemble the type of shells seen in present day ostrich eggs.

With some serration and good enamel, from Carcharodontosaurus saharicus; repaired. 3.34 grams, 29 mm



From the Tegana formation of the Sahara Desert, Morocco, North Africa. Acquired during 1980s. From an old Lincolnshire, UK, collection.

The Carcharodontosaurus saharicus was one of the largest predators (larger than its distant North American T-Rex cousin) of all time and is also related to Allosaurus and the South American Giganotosaurus.