granites, marbles, stones, slates, tile, countertop
Stone Name:Otta Quartzite Natural Cleft
Black - Quartzite
Origin:China
granites, marbles, stones, slates, tile, countertop
Otta Quartzite Natural Cleft Finish
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SURFACE
SIZE SUGGESTION
Natural Cleft
20/30/40/50/60*F.L*(8-30)MM
400/500/700*F.L*(10-30)M
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Otta is an almost black phyllite with hornblende and garnet crystals visible in the surface as glittering spots. Hornblende crystals are seen even better when the surface of Otta has been honed, resulting in a pattern almost three dimensional.
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TEST
STANDARD
VALUE
Petrografic analysis
Phyllit
Density
NS-EN 1936
2810 Kg/m3
Water absorption
NS-EN 13755
0.2% by weight
Flexural strength
NS-EN 12372
44.5 MP
Abrasion resistance
NS-EN 14157(A)
25.0 mm
Slip resistance
NS-EN 14231
64 SRV, dry
18 SRV, wet