With one polished face showing attractive colouring. 5.45 kg, 27.5 cm



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

Comprising twenty amber-coloured pebbles. 223 grams total, 17-37 mm



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

A naturally iridescent Cleoniceras besairiei ammonite. 391 grams, 11.6 cm



From Madagascar. From a Lincolnshire, UK, collection.

Displaying planospirally coiled juvenile portion at the apex and a part of the long, expanding orthoconic adult section with a subdorsal siphuncle connecting the chambers. 204 grams, 99 mm



From China. Acquired at the Kidlington Mineral and Fossil Show, Oxfordshire, UK, in 2016. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Comprising four geode sections, each with a section cut off at the top. 1.65 kg total, 7.9-10.1 cm



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

Displaying the striking swept-back genal spines. 131 grams, 57 mm



From a Cambridgeshire, UK, collection.

Showing the edges of the neural arch and the base of transverse processes. 2.43 kg, 22 cm wide



From Beaufort County, North Carolina, USA. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; with collection no.VM3; his collection of antiquities and natural history was formed since 1948; thence by descent.

Two irregular matrices containing dawn redwood fossils, showing twig and needle leaves. 66 grams total, 51-59 mm



From the Muddy Creek Formation, Beaverhead County, Montana, USA. From a Lincolnshire, UK, collection.

Diplomystus sp. fossil fish on a matrix slab showing good detail to the spine and ribs. 9.4 kg, 46 x 61.5 cm



From a Lincolnshire, UK, collection.

Comprising five Eupatagus antillarum specimens. 540 grams total, 58-71 mm



From a Lincolnshire, UK, collection.

A coarse octahedrite class IIB iron meteorite from a witnessed fall in the former USSR, showing exceptional ablation forms and surface preservation, cleaned. 25 grams, 32 mm



From a 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 Mosasaur prognathodon sp. tooth with some root, fragment of a second tooth beneath the root. 125 grams, 10.4 cm



From a Cambridgeshire, UK, collection.