Natural Emerald Cabochon

Comprising two Mosasaur prognathodon teeth and roots set in composite matrices. 763 grams total, 11.4-12 cm



From a Cambridgeshire, UK, collection. Property of a Cambridgeshire, UK, gentleman.

A high quality pair displaying beautiful brown, green and cream colouring, from a young female Mammuthus primigenius; accompanied by custom-made display stands; some restoration. 24.85 kg total including stands, 151-159 cm long (outer edge)



From the Siberian Tundra. Ex Arctic Antiques, Germany. From the private collection of Commander Michael J Norman OBE AFC RN, Somerset, UK. Accompanied by a copy of a certificate of origin from Germany. Accompanied by a copy of the original purchase invoice (17,838.00 Euros). This lot has been checked against the Interpol Database of stolen works of art and is accompanied by a search certificate no. 12353-225019.

Both tusks were recovered from the same place in the Siberian permafrost in 2016. The left tusk weighs an impressive 6.2 kg and the right tusk 6.02 kg. 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 couldn't get to.

Comprising three Knightia alta fish on individual matrices. 140 grams, 72-90 mm



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.