Branco de Lagoa
Origin: Portugal
Type: Marble
Macroscopic Description
Medium grained rock with granoblastic texture
Petrographic Description
Fine grained marble, with colour varying from whitish-yellow white with grey spots to greyish with whitish-yellow and white spots, sometimes of the called "tiger skin" type.
Physico-Mechanical Properties
- Compression Breaking Load: 806 Kg/cm2
- Compression Breaking Load after Freezing Test: 840 Kg/cm2
- Bending Strength: 172 Kg/cm2
- Volumetric Weight: 2710 Kg/m3
- Water Absorption: 0,08%
- Apparent Porosity: 0,22%
- Thermal Linear Expansion Coefficient: 12,3 (10^6 per ºC)
- Abrasion Test: 3,1 mm
- Impact Test: 57,5 cm
Chemical Properties
- Al2O3: 0,9%
- CaO: 54,2%
- Fe2O3: 0,1%
- K2O: 0,11%
- MgO: 0,44%
- MnO: 0,01%
- Na2O: 0,03%
- P. R.: 43,1%
- SiO2: 0,76%
Microscopical Properties
- Calcite: 99%
- Others: 1%