Comprising various fossil fragments, flint nodules, and other items. 3 kg total, 2.1-10.6 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.

Comprising four circular coasters with cork backing, heat-treated to enhance the banding. 557 grams total, 99 mm



From Arizona, USA. From a Cambridgeshire, UK, collection.

Comprising two light-coloured specimens on a roughly rectangular matrix. 372 grams, 14.2 cm



From a Cambridgeshire, UK, collection.

Comprising three Onchopristus numidus sawfish rostral teeth. 29 grams total, 48 - 59 mm



From a Cambridgeshire, UK, collection.

A freestanding cut and polished section of fossilised tree showing attractive banding. 1.01 kg, 11.5 cm



From a Cambridgeshire, UK, collection.

A large Carcharodontosaurus saharicus dinosaur tooth with part of the root remaining. 48 grams, 85 mm



From Morocco, North Africa. Acquired on the UK art market before 2000. Property of an Essex, UK, gentleman.

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.

Comprising three rounded matrices, two with a single Knightia alta specimen and one with a pair of fish. 188 grams total, 73-98 mm



From a Lincolnshire, UK, collection.

In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish. The Green River system was composed of three lakes: Lake Ulinta, Lake Gosiute and Fossil Lake. These Eocene lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time. The climate was much different from the desert-like climate of this area today. Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today. Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time.

A Carcharocles megalodon tooth displaying some good enamel. 116 grams, 91 mm



From a 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 metres (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.

Comprising two polished examples. 269 grams total, 66-82 mm



From Madagascar. From a Lincolnshire, UK, collection.

Composed of alternating grooved cylindrical and oval beads, interspersed with small cylindrical beads; restrung. 29 grams, 43 cm



Ex London art market. Property of a North London, UK, gentleman.

Comprising two Knightia alta fish on a rounded matrix. 49 grams, 77 mm



From a Lincolnshire, UK, collection.

Composed of facetted polygonal beads interspersed with small oblate beads; restrung. 14 grams, 43.5 cm



Ex London art market. Property of a North London, UK, gentleman.