TRADITIONAL NAME
OTHER COMMERCIAL NAMES
PLACE OF ORIGIN
PETROGRAPHIC NAME (ACCORDING TO EN 12407)
COLOUR
MACROSCOPIC DESCRIPTION
A MEDIUM-FINE-GRAINED YELLOW METAMORPHIC LITHOTYPE THAT IS HETEROGENEOUS DUE TO THE PRESENCE OF CONVOLUTED VEINS. THESE ARE FROM MICROMETRIC TO PLURICENTIMENTRIC IN SIZE AND RANGE IN COLOUR FROM BROWN TO GREEN. THE ROCK IS COMPACT BUT POROUS NEAR THE VEINS.
BLOCK AND SLAB CHARACTERISTICS
AVERAGE SIZE OF BLOCKS: 2,00 X 1,20 X 1,20 M. SLABS ARE PREFERABLY CUT ALONG THE GRAIN AND AGAINST THE GRAIN, I.E. THE HARD WAY. BEFORE SAWING IT IS RECOMMENDED THAT THE BLOCKS UNDERGO RESIN TREATMENT IN A VACUUM. AFTER THIS THE SLABS CAN BE CUT AT A MINIMUM THICKNESS OF 10 MM.
| STANDARD | U.M. | MEAN VALUE | ST. DEV. | |
|---|---|---|---|---|
| EN 13755-08 | WATER ABSORPTION AT ATMOSPHERIC PRESSURE | % | 0,10 | 0,01 |
| EN 1936-07 | APPARENT DENSITY | KG/M3 | 2710 | 4,1 |
| EN 1936-07 | OPEN POROSITY | % | 0,24 | 0,09 |
| EN 12372-07 | FLEXURAL STRENGTH IN NATURAL CONDITIONS | MPA | 20,6 | 2,7 |
| EN 12371-03 | FLEXURAL STRENGTH EXPOSED TO 48 FROST CYCLES | MPA | 16,5 | 5,3 |
| EN 1926-07 | UNIAXIAL COMPRESSIVE STRENGTH | MPA | 69,0 | 22,8 |
| EN 14231-04 | SLIP RESISTANCE (HONED FINISHING): (DRY) (WET) |
USRV USRV |
42 10 |
3 3 |
| ANTIQUED FINISH | YES |
| SAW FINISH | YES |
| DIAMOND SAW FINISH | YES |
| ROCK FACE FINISH | |
| RIVEN CUT FINISH | YES |
| BUSHAMMERED FINISH | YES |
| MACHINE-TOOLED FINISH | YES |
| SCRATCHED FINISH | YES |
| ABRASIVE FINISH | YES |
| MATT FINISH | YES |
| HONED FINISH | YES |
| POLISHED FINISH | YES |
| POINT FINISH | YES |
| RESINED FINISH | YES |
| SANDBLASTED FINISH | YES |
| CHISELLED FINISH | YES |
| POINTED FINISH | YES |
| AXED FINISH | YES |
| REEDED | YES |
| WAXED FINISH | YES |
| WATERJET FINISH | YES |
A CALCITIC CRYSTALLOBLASTIC LITHOTYPE WITH SERIAL HETEROBLASTIC MICROTEXTURES (IN PLACES PORPHYROBLASTIC). THE MAIN COMPONENT IS CALCITE (>95%) IN STRAIGHT ANHEDRAL CRYSTALS THAT IS MARKEDLY ANISOTROPIC DUE TO THE ALIGNMENT OF THE BLASTS THAT GENERATE BAND FOLIATION. THE CRYSTALS VARY FROM 60 TO 900 ΜM IN SOME VEINS AND PATCHES OF THE MOSAIC WHERE THERE ARE ALSO QUARTZ BLASTS WHICH TEND TO BE EUHEDRAL (<0.8 MM). WHERE THE VEINS ARE LOCATED THE QUARTZ IS ASSOCIATED WITH OPAQUE MINERALS COMPOSED OF LIMONITE AND HEMATITE, CHLORITE, ACICULAR MUSCOVITE AND TOURMALINE.
THE REFERENCE SAMPLE DOES NOT IMPLY STRICT UNIFORMITY BETWEEN THE SAMPLE ITSELF AND THE ACTUAL MATERIAL; NATURAL VARIATIONS MAY ALWAYS OCCUR. ALTHOUGH ALL EFFORTS HAVE BEEN MADE TO REPRODUCE THE EXACT LIKENESS OF THE MATERIALS, THERE MAY BE SLIGHT DIFFERENCES DUE TO THE PRINTING PROCESS. THE TECHNICAL INFORMATION FOR THE MATERIALS IS BASED ON TESTS CARRIED OUT AT THE MARBLE LABORATORY OF THE POLITECNICO DI TORINO DIPARTIMENTO DI INGEGNERIA DEL TERRITORIO, DELL'AMBIENTE E DELLE GEOTECNOLOGIE AND PROVIDES A REFERENCE FOR THEIR CHARACTERISTICS. NATURAL STONE MATERIALS ARE HOWEVER NATURAL PRODUCTS AND AS SUCH ARE SUBJECT TO VARIATIONS. HENCE IT IS GOOD PRACTICE TO TEST THE MATERIALS EACH TIME THEIR SPECIFIC PHYSICAL-MECHANICAL PROPERTIES ARE REQUIRED.
