We are proud to introduce our latest product, the fascinating Koida Black. It is quarried in North Karelian region. This timeless dolerite usually maintains fine or medium texture. It has a rich black colour with extremely hard and tough surface, which polishes exceptionally well.
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Mineral composition
| Plagioclase | 53,6 | % |
| Pyroxene | 39,0 | % |
| Opaque | 6,4 | % |
| Amphibole | 1,0 | % |
Tecnical properties of Koida Black material
| Compression strength (EN 1926) | 366 | MPa |
| Flexural strength (EN 12372) | 26.8 | MPa |
| Frost resistance | Good | |
| Water absorption (EN 13755) | 0.046 | % |
| Density (EN 1936) | 3092 | kg/m3 |
| Frost resistance (EN 12371) | No visible changes | |