|
Commercial names:
Lilac Pearl
Dimension stone type:
Gneiss, Multicoloured
Producer:
Kaavin Kivi Oy, Kirjekuorentie 6, FIN-73600 Kaavi, Finland. Phone +358 17 6880100, Telefax +358 17 6880112 Internet: www.kaavinkivi.fi
Quarried at:
Kulvemäki, Rautavaara, Finland
Multicoloured gneiss has good polishing properties and it is suitable for both interior and exterior use. Deep lilac red gives an unique status for Lilac Pearl.
Structure of the rock:
Slightly streaky structure with light and dark bands.
MINERALOGY
Method of determination
Point-counting analysis (1000 points/sample), 2 thin sections.
Mineral composition:
| Mineral |
|
2 thin sections |
| Garnet: |
|
15,9 |
| Ambfibole/nuummite: |
|
17,5 |
| Quartz: |
|
39,9 |
| Cordierite: |
|
22,3 |
| Chlorite: |
|
3,1 |
| Biotite: |
|
0,2 |
| Opaques: |
|
1,1% |
General rock name
Cordierite - garnet - nuummite gneiss
Colour
Dark general appearance with strong lilac, some golden brown and shiny blue tones. White quartz veins give lively appearance. Garnet rich.
Texture
Slightly banded, grain size 0,1 - 5 mm
Mohs' hardness
6,1 - 6,6
Physical properties
Determined by North Karelia Polytechnic Laboratory for testing of building materials. Test number KKSH010408.
Absorption:
(prEN-13755) |
|
0,08 w-% |
Compressive Strenght:
(SFS-EN 1926) |
|
233 MPa |
Modulus of Rupture:
(SFS-EN 12371) |
|
23,9 Mpa |
Bulk Specific Gravity:
(SFS-EN 1936) |
|
2928 kg/m³ |
|
|
 |
| polished |
 |
| cleaved |
 |
| matt honed |
 |
| flamed |
 |
| bush hammer finish |
|
