A rounded matrix with multiple Knightia alta specimens. 135 grams, 12.2 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 three clear quartz marbles, each with needle-like inclusions of rutile. 43 grams total, 21-22 mm



Ex property of a UK gallery, early 2000s.

Comprising three large polished slices, each showing natural banding and one with quartz crystals to the centre; two dyed. 750 grams total, 14.2-23 cm



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

A roughly triangular section with small light purple amethyst crystals. 1 kg, 24 cm



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

Comprising six large clear to translucent prismatic points with inclusions. 1.49 kg total, 67-96 mm



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

Comprising three torpedo-shaped matrices with Orthoceras sp. specimens. 252 grams total, 12.2-14.9 cm



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

Comprising three egg-shaped agate specimens and one in blue calcite(?). 780 grams total, 60-68 mm



Burwell collection, Cambridgeshire, UK.

Comprising eight dyed geode halves, each with an exposed crystal-lined internal cavity. 672 grams total, 58-74 mm



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

A good study group of various fossilised corals, some cut sections, and some displaying multiple branches. 2.8 kg total, 2.3-20.5 cm



Burwell collection, Cambridgeshire, UK.

Including an ashtray and two paperweights carved from banded stone. 1.06 kg total, 50-79 mm



Burwell collection, Cambridgeshire, UK.

A single Knightia alta specimen. 71 grams, 86 mm



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.

Mixed group of various sizes, all with preserved scales and tripartite body structure. 983 grams total, 65-85 mm



Acquired on the UK art market before 2000. Property of an Essex, UK, gentleman.