Port Laurent Noir
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.
The basic mass of this stone is black-brown lime sediment, which has clay inclusions (coloured by limonite) of undefined shape and size. Also purple stria (pigment: Hematite) contribute to the changeable, decent play of colours. White to yellowish calcite veins or clouds generate a clear contrast, which interrupt the background.
Lime stone of this kind is generated by deposition of lime sludge on the sea bed in an oxygen-free environment; whereby bitumen substances (sludge) and traces of various iron oxides have been imbedded. The many white veins from crystal lime spar give proof that the lime stone has been broken in earlier periods. Actually, the previous cracks have completely healed again and have been "welded? with the same mineral as in the lime stone itself.
|Structure Type||Slab with Irregular Pattern|
|Synonyms||Nero Port Laurent, Noir Saint Laurent|
|Colouring Minerals||Black-brown limestone with white, crystalline calcite veins|
|Average Hardness||3 (according to Mohs's hardness scale 1-10) / Soft stone|
|Deposit||Laurens / n' Beziers / France|