Natural History - Polished Agate Mineral Specimen

A substantial, naturally formed grey limestone gogotte. 975 grams, 14.2 cm



Early 1990s London collection. Acquired on the UK art market. From a private collection, Lancashire, UK

Gogottes were displayed at the chateau of Fontainebleau, France, collected by King Louis XIV (1638 -1715). They were used to decorate the formal gardens of the royal residence at Versailles, especially l’Encelade, Les Trois Fontaines and La Salle de Bal. Elsewhere, they were treasured in Song Dynasty China (960-1127 A.D.) In the 20th century, natural forms inspired the sculptor Henry Moore and others.

A fossil crab on a sedimentary matrix, the matrix carved to act as a stand for display. 300 grams, 12.2 cm wide



From a Lincolnshire, UK, collection.

A group of two Campo del Cielo nickel iron (IAB) meteorites; each held in a plastic display case with identification label. 18.8 grams total, case 40 x 34 mm each



From Chaco Province, Argentina, found 1576. Property of a Sussex, UK, teacher.

A crater field of roughly 26 craters was found in the vicinity of this crater, which is estimated to date to 4-5 thousand years BP. The age of the meteorite itself is thought to be c.4.5 billion years, formed as part of the development of this solar system. The largest two fragments, the 30.8 ton Gancedo and 28.8 ton El Chaco, are among the heaviest meteorite masses ever recovered on Earth. In 1576, the governor of a province in Northern Argentina commissioned the military to search for a large mass of iron, which it was believed ‘the natives’ claimed had fallen from the sky and which they used for their weapon production. The expedition discovered a large mass of metal which was assumed to be an iron mine and brought back a few samples, which were described as being of unusual purity. Following the legends, in 1774 Don Bartolomé Francisco de Maguna rediscovered the iron mass. He himself did not believe that the stone had fallen from the sky and assumed that it had formed by a volcanic eruption. However, he sent the samples to the Royal Society of London. In 1990 it became protected by law.