Gris Perl Origin: Spain Block sizes: Normaly big blocks Colour uniformity: Very well Availability: Excellent Material used for: interior exterior Polishing treatment: Very well Other surface's treatments: Good General comments: Typical material to be used in large quantity. A prior selectoin is recommened. The therm.finish. so as the sand-blasting treatment is recommened. Examples of tests' results: 1. Compressive strength 1623 Kg/sq.cm. 2. Ditto after gelivity 1607 Kg/sq.cm. 3. Water absorption 0.58 % 4. Ultimate tensil strength 142 Kg/sq.cm. 5. Impact test-min.fall height 69 cm. 6. Coef. thermal expans 0.0078 7. Abrasion coefficient 1.36 8. Bulk density 2588 Kg/m3. 9. Elasticity module --- 10. Knoop microhardness 603 sq.mm. 11. Flexural strength --- 12. Porosity ---       Затвори