Otodus Fossil Shark's Tooth Necklace

A polished geode section with deep amethyst-lined cavity, intergrown white calcite crystals at the base; mounted on a custom-made display stand. 7.46 kg, 36.5 cm including stand



From Artigas, Uruguay. Property of a London lady.

A Knightia alta fish on a rectangular limestone matrix with remains of another one on the reverse. 453 grams, 17.8 cm



From a Cambridgeshire, 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.

Boxed group of large pyramidal pale purple amethyst crystals. 4.15 kg total including box, 54-73 mm



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