A cut section of beautifully layered amethyst crystals with orange druse, polished stalactite formations on the field formed of green celadonite, red-brown agate and white quartz; mounted on a custom-made display stand. 10 kg total, 53 cm high including stand



From Artigas, Uruguay. Property of a London lady.

Comprising: pseudomalachite from the Democratic Republic of Congo; hematite from Llanharry Mine, Glamorganshire, South Wales; axinite from Peru; baryte from Wapping Mine, Derbyshire; prehnite, stilbite and heulandite from Poona, India; wulfenite from Red Cloyd Mine, USA; analcime from Croft Quarry, Croft, Leicestershire; pyrite from Goat Quarry, Aberdare, Fife, Scotland; gypsum rose from Tunisia; epidote from Iceland. 1.13 kg total, 1.3-10.6 cm



From the private collection of a Cornish, UK, gentleman.

Composed of irregular, unpolished beads with a metal closure, restrung. 81 grams, 21.7 cm



From London, UK, gallery collection, 1990s.

A large, rounded pebble containing a Dactylioceras tenuicostatum specimen. 1.36 kg total, 9.7-11.6 cm



From Whitby, UK. From a Lincolnshire, UK, collection.

A cylindrical pot with a domed lid carved from fossiliferous stone and the lid set with a Goniatite sp. 245 grams total, 58 mm high



From a Cambridgeshire, UK, collection.

A naturally iridescent Cleoniceras besairiei ammonite. 470 grams, 13 cm



From Madagascar. From a Lincolnshire, UK, collection.

Piriform in profile with glossy, pitted surface; displayed in a glazed wooden presentation case. 425 grams total, 24.9 x 11.3 cm



From Asia. Acquired on the UK art market. From the private collection of an East Anglian, UK, Specialist Collector.

Tektites are lumps of black or dark grey natural glass produced from melted crustal rocks that are caused by large hypervelocity meteorite impacts on sediments.

On a tongue-shaped matrix showing part of the stalk and calyces. 739 grams, 18.7 cm



From a Cambridgeshire, UK, collection.

Showing attractive agatized patterns. 622 grams, 91 mm



From a Lincolnshire, UK, collection.

Restrung, using recently polished Mammuthus primigenius spherical bone beads. 163 grams, 58 cm



London, UK, collection, 1990s.

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 three tooth specimens, each set on a sandstone matrix. 727 grams total, 77-85 mm



From a Cambridgeshire, UK, collection.

Showing good detail to the body and spines, on a matrix. 278 grams, 95 mm



From Morocco. From a Lincolnshire, UK, collection.