Comprising two irregular matrices, each with an Ophiuroidea sp. specimen. 464 grams total, 9-12.5 cm



Ex Lincolnshire, UK, collection.

Comprising three matrices, each with a Carpopenaeus sp. specimen, one dendritic. 306 grams total, 75-85 mm



From a Cambridgeshire, UK, collection.

Comprising three rectangular matrices, each with a Carpopenaeus sp. specimen, one dendritic. 447 grams total, 84-89 mm



From a Cambridgeshire, UK, collection.

Comprising ten cut geode sections, each with an exposed internal cavity showing crystal formations; one dyed. 1.06 kg total, 44-66 mm



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

Restrung using recently polished Mammuthus primigenius bone beads. 144 grams, 56 cm



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

The mammoth lineage branched from the Asian elephant around 6 million years ago, and later on the Woolly Mammoth, Mammuthus primigenius, evolved in eastern Siberia. Woolly mammoths, being slightly smaller than living African elephants, were foragers and ate grass, as well as small, nutritious flowering plants that flourished in the environment where they lived. They may also have used their curved tusks to dig through snow and eat plants that other foragers were unable to reach.

Comprising: a geode section with amethyst and quartz crystals; cluster of prismatic quartz crystals, some transparent. 743 grams total, 7.8-12.3 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 fifty cut sections showing satin-like lustre. 927 grams total, 50-71 mm



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

Comprising three large cut sections displaying brown and blue banding. 2.39 kg total, 9.9-14.2 cm



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

Comprising two freestanding geode sections with crystal lined centres, dyed. 2.06 kg total, 10.8-11.2 cm



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

Clusters of reddish brown crystals in a variety of sizes. 1.25 kg total, 16-49 mm



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

Showing bark detail on the edges, the cut face showing attractive agatized patterns. 1.06 kg, 23 cm



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

A naturally iridescent Cleoniceras besairiei ammonite. 390 grams, 11.5 cm



Ex Lincolnshire, UK, collection.