Natural History - Cut and Polished Agate Crystal Geode Coaster Group [6]

Carcharocles megalodon tooth displaying some good polished enamel. 198 grams, 95 mm



Ex Lincolnshire, UK, collection.

Carcharodon megalodon is regarded as one of the largest and most powerful marine predators in vertebrate history and likely had a profound impact on structuring of the marine communities. Fossil remains indicate that this giant shark reached a length of more than 16 meters (52 ft) and also affirm that it had a cosmopolitan distribution. Scientists suggest that in life it looked like a stockier version of the great white shark, Carcharodon carcharias.

A large section of Charonosaurus sp. hadrosaur egg nest on matrix, including three eggs each retaining some of the original shell surface. 17.3 kg, 43 cm



From a collection acquired on the UK art market from various auction houses and collections mostly before 2000. From an important Cambridgeshire estate; thence by descent.

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.

Comprising six polished specimens on a textured matrix. 1.19 kg, 21 cm



From the Atlas Mountains of Morocco, North Africa. From a Cambridgeshire, UK, collection.