Comprising twelve polished buttons formed from fossiliferous stone containing Goniatite specimens. 114 grams total, 28-37 mm



From Morocco, West Africa. Ex Norfolk, UK, collection.

A cut section of a geode lined with dark purple amethyst crystals. 2.94 kg, 25 cm



From the private collection of author and historian Dr DeWitt Bailey, one of the global authorities on the confederate army in the US civil war; thence by descent to his grandson.

A Carcharocles megalodon shark tooth, with serrations and good polished tooth enamel. 114 grams, 98 mm



Found Wrightsville Beach, North Carolina. Ex The Fossil Exchange. From a private Tyneside collection, formed since the early 2000s. Accompanied by a Fossil Exchange information card.

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 natural beryl in various size chunks. 2.6 kg total, 32-68 mm



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

Comprising a curving body on a rectangular limestone matrix, showing elongated head with pointed jaws, small fins and forked tail, possibly Aspidorhynchus. 1.45 kg, 34.4 cm



From a private Tyneside collection, formed since the early 2000s.

Comprising two rectangular matrices, each with a Knightia alta specimen. 364 grams total, 8.3-11.2 cm



From Wyoming, USA. Ex Lincolnshire, UK, collection.

Comprising two obelisks with facetted edges. 96 grams total, 70-71 mm



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

A coarse octahedrite class IIB iron meteorite; cleaned. 44.3 grams, 30 mm



Ex Lincolnshire, UK, collection.

Sikhote-Alin is an iron meteorite that fell on February, 13, 1947 on the Sikhote-Alin Mountains in eastern Siberia. Though large iron meteorite falls had been witnessed previously and fragments recovered, never before in recorded history had a fall of this magnitude been observed. An estimated 70 tonnes of material survived the fiery passage through the atmosphere and reached the Earth. The strewn field for this meteorite covered an elliptical area of about 1.3 km2 (0.50 sq mi). Some of the fragments made impact craters, the largest of which was about 26 m (85 ft) across and 6 m (20 ft) deep. Fragments of the meteorite were also driven into the surrounding trees. The Soviet Union issued a stamp for the 10th anniversary of the Sikhote-Alin meteorite shower and this reproduces a painting by P. J. Medvedev, a Soviet artist who witnessed the fall: he was sitting in his window starting a sketch when the fireball appeared, so he immediately began drawing what he saw.

A large Goniatite specimen set on a textured matrix. 487 grams, 15.3 cm



From Morocco, West Africa. Ex Cambridgeshire, UK, collection.

A thick section of a geode with both sides polished, the inner ring lined with large light purple amethyst crystals. 4.26 kg, 31.5 cm



From the private collection of author and historian Dr DeWitt Bailey, one of the global authorities on the confederate army in the US civil war; thence by descent to his grandson.

Comprising variously sized polished Orthoceras sp. specimens on a textured freestanding matrix. 1.44 kg, 20.3 cm



From Morocco, North Africa. From a Cambridgeshire, UK, collection.

The tooth showing dark brown enamel, set in a sandstone matrix with a composite root for display. 584 grams, 16 cm



From Morocco, North Africa. From a Cambridgeshire, UK, collection.