Natural History - Historic 'Zimbabwe' Emerald in Quartz Specimen

A roughly oval matrix with a Knightia alta fossil fish. 70 grams, 10.5 cm



Acquired on the UK art market. Property of a Essex, UK, collector.

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.

Supplied in the original box with typed label, comprising: calcrete, serpentine, yellow fluorspar, banded jasper, pink dolomite, rainbow jasper, pyrite, rose quartz, lipidolite, unakite, paisley agate, coral jasper, aventuring, yellow fire jasper; grey granite, carnelian, zebra jasper, white quartz silica, petrified wood and pink limestone. 300 grams total, 15 x 12 cm including box



Acquired on the UK mineral and fossil market, since 1970. From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent.

Showing some octahedral crystals, collection number 277. 26 grams, 48 mm



Acquired on the UK mineral and fossil market, since 1970. From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent. Accompanied by an original historic index file card.