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 rock consists mainly of aragonite, a special kind of the calcium carbonate with needle-like crystals. Almost pure layers alternate with layers coloured brown by limonite.
Sinter limestone belongs to the sedimentary rocks. It deposits at hot sources with lime-containing water. If metal oxides are dissolved in the thermal water, these imbed into the limestone and colour it more or less extensive. If the concentrations of the dissolved oxides change continuously, this shows in very decorative bands.
|Structure Type||Slab with Irregular Pattern|
|Petrographic Assignment||Onyx (Lime sinter)|
|Age||2 m. years (Quaternary)|
|Colouring Minerals||Aragonite coloured brown by limonite|
|Average Hardness||3 (according to Mohs's hardness scale 1-10)|