Ancient Art, Antiquities, Books, Natural History, Stamps & Coins

Carcharocles megalodon shark tooth, with serrations and polished light brown tooth enamel. 284 grams, 12.7 cm



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 the structuring of 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.

Showing the almost complete skeleton of Barasaurus besairiei; some restoration. 434 grams, 20.7 cm



From a UK collection formed in the 1980s. Property of an Essex, UK, gentleman.

Barasaurus is an extinct genus of the Owenettid procolophonoid parareptile.

Comprising: mica, green calcite, green fluorite, amethyst, pink tourmaline on a matrix, twinned staurolite, aragonite cluster, melanite, tumbled serpentine specimen, and a bottle of 'gold leaf' in propylene alcohol. 575 grams total, 30-78 mm



From the collection of Mr Carlos Bahamonde, Manchester, UK.

A large Clypeaster altus fossil sea urchin, polished to enhance the surface detail. 2.18 kg, 17.5 cm



From Morocco, North Africa. Property of a Bristol, UK, gentleman collector.

Conical tooth with light brown enamel. 9.14 grams, 48 mm



From a UK collection formed in the 1980s. Property of an Essex, UK, gentleman.

The Spinosaurus was both a beachcomber-type scavenger and an active hunter, taking small stranded Plesiosaurs, Pterosaurs, turtles and large fish; adults weighed up to 21 tonnes and grew up to 18 meters long.

Rounded, blunt tooth with dark brown enamel on a sandstone matrix. 421 grams, 13 cm



Acquired on the UK fossil and mineral market. Property of a West Sussex, UK, gentleman.

Mosasaur globidens grew up to the size of modern large crocodiles and was unusual compared to other Mosasaur species in that it hadn't evolved into a fast, agile predator. It preyed on slow-moving, heavily armoured prey and was adapted to crushing through their shell.

Polished slab showing contrasting banding in various shades of brown. 875 grams, 20.5 x 15.2 cm



From Western Australia. Property of a Bristol, UK, gentleman collector.

Tiger iron is a 1.8- to 2.5-billion-year-old metamorphic rock composed of alternating bands of hematite, red jasper, and golden tiger's eye, closely linked in origin to ancient photosynthetic cyanobacteria. Early fossil algae helped create the oxygen-rich atmosphere that eventually allowed life on Earth to flourish.

Dark green prismatic crystals in iron-rich matrix. 239 grams, 91 mm



From Bolivia. From the collection of Mr Carlos Bahamonde, Manchester, UK.

Freestanding display of fossilised wood, polished to enhance the attractive graining in contrasting colours. 7 kg, 29 cm



From Java, Indonesia. Property of a Bristol, UK, gentleman collector.

Polished and dyed slice with a fanciful image at the centre, viewable from both sides. 62 grams, 74 mm



From Brazil. Property of a Bristol, UK, gentleman collector.

Polished specimen showing attractive iridescence, carefully released from a matrix and mounted on a slate tile. 1.64 kg, 22 x 19 cm



From Madagascar. Property of a Bristol, UK, gentleman collector.

Composed of tubular and large semi-circular beads interspersed with granulated metal collars, restrung. 45.9 grams, 32 cm



Ex West London, UK, collection, 1990s.