Online catalogue for the 63rd tribal art auction with special part 'wunderkammer'
1 Septaria
This object is not available any more.
Curiosities
calcite with clay, of irregular form, polished top side, min. dam., slight traces of abrasion; the word comes from the Latin word "septum" meaning "partition", and refers to the cracks/separations in this kind of rock. There is an incorrect explanation that it comes from the Latin word for "seven", "septem", referring to the number of cracks that commonly occur. Cracks are highly variable in shape and volume, as well as the degree of shrinkage they indicate. Although it has commonly been assumed that concretions grew incrementally from the inside outwards, the fact that radially oriented cracks taper towards the margins of septarian concretions is taken as evidence that in these cases the periphery was stiffer while the inside was softer, presumably due to a gradient in the amount of cement precipitated.
L: ~ 28 cm; H: 19,5 cm
L: ~ 11 inch; H: 7.7 inch
Sold.
2 Morasko meteorite
This object is not available any more.
Curiosities
of nearly rectangular form with an irregular ending, containing a rough, circular inclusion, with polish certificate; the Morasko meteorite nature reserve is located in Morasko, on the northern edge of the city of Poznań, Poland. It contains 7 meteor craters on an area of 55 hectares. The largest of the seven craters on the reserve has a diameter of about 100 m, and is about 11 m deep. Five of the craters, including the largest, contain lakes. The date of formation is estimated to be about 5000 years ago (Holocene). The first meteorite found at Morasko was uncovered in 1914 by German soldiers working on the construction of a military fortification. Since then, many further fragments have been found, including one weighing 78 kg in 1956.
M: 7,3 cm x 4 cm
M: 2.9 inch x 1.6 inch
Price: 600 - 1300 €
3 Fragments of meteorites
This object is not available any more.
Curiosities
3 pieces, an almost square gibeon meteorit, etched with inclusion, with certificate of Christian P. Stehlin, Switzerland, 30. April 1907, found in Namibia in 1836, class: ferrum III A, weight: 18,8 g; m: 2,5 cm x 2,8 cm; a chondrite of irregular shape, found in Hamada Al Hamra, Libya, m: 6,5 cm x 3 cm; additionally a pallasite, fell in 1956 in Russia near the river Kosva and the towns of Ugle-Uralsk, m: 3,8 cm x 3,5 cm; all kept in plastic boxes; a pallasite is a type of stony-iron meteorite. It consists of olivine crystals of peridot quality in an iron-nickel matrix. Coarser metal areas develop Widmanstätten patterns upon etching. They are namend after the scholar Peter Simon Pallas, who found the first "pallasite" near Krasnojarsk in Sibiria.
Price: 200 - 400 €
4 Fragments of meteorites
This object is not available any more.
Curiosities
a Sikhote-Alin meteorite of irregular shape, showing a mat silver surface, l: 4 cm; Sikhote-Alin is an iron meteorite that fell in 1947 on the Sikhote-Alin Mountains in Russia. This fall is among the largest meteorite showers in recent history; additionally a square Brahin meteorite, m: 2,3 cm x 2,3 cm; Brahin is a meteorite pallasite found by a farmer in 1807 in Woblast Homel (Russia). This is the second meteorite ever found in Russia after Krasnojarsk in 1749. It weighed 850 kg. It has been proposed that pallasites represents the interface between the stone mantle and the metal core of differentiated asteroids.
Price: 250 - 500 €
5 Morasko meteorites
This object is not available any more.
Curiosities
of irregular, flattened form, shiny silver surface, consisting of 94 % iron and 6 % nickel, m: 5 cm x 3,5 cm; a plessite meteorite, of flat, nearly triangular form, found in Taza, Morocco, Northern Sahara, l: 4,5 cm; a meteorit Campo del Cielo, found in Campo del Cielo, Argentinia, class: iron (IAB) coarse octahedrite, L: 3,5 cm; all kept in plastic boxes; the Campo del Cielo refers to a group of iron meteorites or to the area where they were found situated on the border between the provinces of Chaco and Santiago del Estero, 1000 km northwest of Buenos Aires, Argentina. The crater field covers an area of 3×20 km and contains at least 26 craters, the largest being 115×91m. The craters' age is estimated as 4000–5000 years. The craters, containing iron masses, were reported in 1576, but were already well known to the aboriginal inhabitants of the area. The craters and the area around contain numerous fragments of an iron meteorite. The total weight of the pieces so far recovered exceeds 100 tons, making the meteorite the heaviest one ever recovered on earth.
M: 5 cm x 3,5 cm
M: 2 inch x 3,2 inch
Price: 250 - 500 €
6 Two Gibeon meteorites
This object is not available any more.
Curiosities
an example smoothed on two sides, showing a beautiful surface, l: 9,5 cm and one of irregular shape with natural finish, l: 4,8 cm; Gibeon is a meteorite fallen in prehistoric times in Namibia. It was named after the nearest town: Gibeon. The fragments in the strewn field are dispersed over a 275 km long and 100 km wide elliptical-shaped area.
Sold.
7 Geode
Curiosities
of oval form, split in two halves, inside filled with bowl-shaped arranged, dark shiny minerals, min. dam., slight traces of abrasion; geodes are geological rock formations which occur in sedimentary and certain volcanic rocks. They are essentially rock cavities or vugs with internal crystal formations or concentric banding. The exterior of the most common geodes is generally limestone or a related rock, while the interior contains quartz crystals and/or chalcedony deposits. Other geodes are completely filled with crystal, being solid all the way through. These types of geodes are called nodules.
D: 8 cm
D: 3.1 inch
Price: 50 - 100 €
8 Geodes
Curiosities
4 pieces, of rounded form with a white, rough mantle, split in two halves, inside filled with bluish, crystalline deposit, min. dam., d: 7 cm; additionally a smaller, two-parted irregular formed geode filled with bluish minerals (agate stone, chalcedony ?), min. dam., d: 5 cm
Price: 65 - 130 €
9 Petrified wood
Curiosities
a disc-shaped piece with irregular rim, d: 11,5 cm and a nearly oval piece, h: 3,5 cm, d: 5,5 cm, both coming from Arkansas, USA; additionally a polished agate stone disc from Morocco, d: 10 cm; petrified wood is a type of fossil that consists of fossil wood in which all the organic materials have been replaced with minerals (most often a silicate, such as quartz), while retaining the original structure of the wood. The petrifaction process occurs underground, when wood becomes buried under sediment and is initially preserved due to a lack of oxygen. In general, wood takes less than 100 years to petrify. The organic matter needs to become petrified before it decomposes completely.
Price: 80 - 150 €
10 Trilobite
Curiosities
fossilised, of elongated form, in a stretched out position, in a good state of preservation; coming from the area of Efut, Morocco. trilobites (meaning "three lobes") are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites first appear in the fossil record during the Early Cambrian period (540 million years ago) and flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders, with the sole exception of Proetida, died out. Trilobites finally disappeared in the mass extinction at the end of the Permian about 250 million years ago.
L: 17,5 cm; B: 9,5 cm
L: 6.9 inch; B: 3.7 inch
Literature
Ivanov, Martin u.a., Fossilien-Enzyklopädie, Eggolsheim 2001, p. 65
Price: 450 - 900 €
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