Comprising three rounded matrices with Knightia alta fish fossils. 143 grams total, 8.6-10.5 cm



From Wyoming (Green River Formation), USA. 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.

Comprising variously sized specimens, some translucent. 2.68 kg total, 32-92 mm



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

Comprising three teeth with some root, one repaired. 52 grams total, 55-60 mm



From Atlas Mountains, Morocco, North Africa. From a Lincolnshire, UK, collection.

Comprising geode sections with clusters of lavender-coloured amethyst crystals. 1 kg total, 5.3-12.1 cm



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

Composed of graduated cylindrical and biconical fluted beads; restrung. 195 grams, 64 cm



Ex West country, UK, collection, 2000s.

Crocodilienovum major crocodile egg on an irregular matrix. 398 grams, 13.2 cm



From a Cambridgeshire, UK, collection.

Comprising thirteen dyed slices, some with crystal formation to the centre. 866 grams total, 8.4-14.3 cm



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

The matrix showing pale sky-blue opal, collection number 425, with an old James Walker label. 34.8 grams, 39 mm



Acquired on the UK mineral and fossil market, since 1970. From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent. Accompanied by an original historic index file card.

Each a prismatic point set in a white metals sleeve with suspension loop. 95 grams total, 20-27 mm



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

A complete preserved Mesosaurus brasiliensis skeleton in limestone. 1.11 kg total, 26.7 cm



From the Irati-Formation, Parana Delta, Brazil. From a Berkshire, UK, collection.

The mesosaurs were fast swimming predators which lived in fresh water, probably preying on small fish, insects and other aquatic invertebrates.

Comprising two cut slices with one polished face displaying attractive multicoloured banding. 2.75 kg total, 30.5-31 cm



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

A large piece with insect and other inclusions. 6.61 grams, 55 mm



From a Lincolnshire, UK, collection.