Uba Tuba
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.
Petrography
Charnockite is a predominantly dark green plutonic rock similar to granite, the magma of which originates from the transition area between earth crust and upper earth mantle. At the grain boun-daries, gold brown to yellow olive coloured pig-mentations can be found which give the rock a most interesting decor. The yellowish portions have been generated by metamorphosis of hypersthene minerals. Depending on lighting and viewing angle, the feldspar crystals, structured in zones, show slight light reflections. Quartz occurs in rather
insignificant quantity in the form of small colourless or light blue-grey crystals.
Petrogenesis
During the Precambrian Period (primeval period) huge magma complexes surfaced from the transition zone between earth mantle/earth crust and formed granite or granite-like plutonic rocks. In the case of the Ubatuba massif, a pyroxene and ore-rich type of magma dominated, which settled below the earth crust and crystallised in stable cooling conditions. These deposits were uncovered during the millions of years by movements of the earth crust and erosion. Today they can be quarried directly below the vegetation cover.
| Price group | 2 |
|---|---|
| Colour | grey |
| Hardness | Hard Stone |
| Structure Type | Homogeneous Structure |
| Outdoor | suitable |
| Synonyms | Ubatuba Gold, Bahia Green, Lincoln, Verde Amazonia |
| Group | Original Rock Type |
| Petrographic Assignment | Granite |
| Age | 1.2 billion years (Precambrian) |
| Deposit | Brasilien |
| Novelty | No |
| Colour | grey |
|---|---|
| Hardness | Hard Stone |
| Structure Type | Homogeneous Structure |
| Synonyms | Ubatuba Gold, Bahia Green, Lincoln, Verde Amazonia |
| Group | Original Rock Type |
| Petrographic Assignment | Granite |
| Age | 1.2 billion years (Precambrian) |
| Deposit | Brasilien |