The close-up view of each stone type shows a relatively true image of the crystalline structure and the colouring. This is suitable for grained slabs to a limited extend only. In regard to the colour matching, please take an original sample of the stone from your furniture store as a basis.
A grey-black to black sludge, which is covered with orthoceras, the shells of fossil cuttlefish; the currently most famous representatives of which are the "Squid?. The shells are conical and have clearly visible chambers. The animal itself, of which obviously no residues are left, lived in the front part of the housing, while the empty chambers could be "balanced? with air and water. After the dead of the animal, these were filled to only a small portion with sediment, but mostly with crystalline, bright lime spar. Such a rich enclosure of these orthoceras ("Straight horns?), which in the medieval age were assumed to be horns of the "unicorn?, can worldwide only be found in this stone.
Lime spar is sediment rock. In this case, it is a so called sludge limestone, the dark colour of which is caused by organic substances (bitumen). Such limestone is only generated on the sea bed in an oxygen-starved environment.
|Structure Type||Slab with Irregular Pattern|
|Synonyms||Galaxia, Galaxy, Fossil Black, Morocco Black|
|Petrographic Assignment||Limestone with orthoceras|
|Age||Devon (approximately 395 - 345 million years)|
|Colouring Minerals||Calcite, coloured black by carbon-like substances and low bitumen contents|
|Average Hardness||3 (according to Mohs's hardness scale 1-10) / Soft stone|
|Deposit||Tazzarine / n' Zagora / Morocco|