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The unmistakable peculiarities of Orobic marble are its unique colours and natural design, stemming from a tropical environment similar to the present-day Bahamas, with clear, lukewarm water and coral reefs as far as the eye can see. From a petrographic point of view, it is a veined or laminated limestone, distinguished by its own peculiar colouring derived predominantly from the presence of oxides and ferrous hydroxides, dolomite and volcanic ash. The many varieties of the predominant colours can be seen inside the serviceable width.
The following varieties are currently available for sale:
Orobico red
Orobico grey
Orobico pink
Orobico grey/pink
From a technical standpoint, Orobic marble bears any comparison: its compressive and flexural strength is very high, its durability (I.e. resistance to tread) is good; its extremely low water absorption coefficient ensures negligible porosity, consequently it does not suffer damage from frost or ice. Overall, therefore, its characteristics show that this type of material is not only perfectly suited to traditional usage in flooring, fittings, etc., but also for applications such as external facings on rustic surfaces.


Calcareous sedimentary litho-type, very fine grained, with centimetrical veins of different hues, such as grey, grey- pink,pink red.

Petrographic examination
according to UNI EN 12407:2001

(Folk, 1959,1962)

Determination of flexural strength under concentrated load
according to UNI EN 12372:2001

Rtf = 11,4 MPa
s = 4,5 MPa

Determination of flexural strength under concentrated load
after 48 freeze/thaw cycles
according to UNI EN 12371:2003

Rtf = 10,6 MPa
s = 4,3 MPa
Variations = - 7 %

Determination of compressive strength
according to UNI EN 1926:2000

Rm = 125 MPa
s = 16 MPa
v = 0,1

Determination of water absorption at atmospheric pressure
according to UNI EN 13755:2002

Ab = 0,1%

Determination of apparent density
according to UNI EN 1936:2001

pb = 2704 Kg/m3

Determination of open porosity
according to UNI EN 1936:2001

P0 = 0,25 %

Determination of water absorption coefficient by capillarity
according to UNI EN 1925:2001

C1 = 0,083 g/m2. s 0.5

Determination of resistance to ageing by thermal shock (20 cycles)
according to UNI EN 14066:2004

Dm = - 0,06 %

Determination of slip resistence by means of the pendulum tester
according to UNI EN 14231:2004; appendix D UNI EN 1341:2003;
appendix C UNI EN 1342:2003

SRVd = 73 ( dry conditions)
SRVw = 25 ( wet conditions)

Determination of abrasion resistance
according to UNI EN 14157:2005

17,7 mm

Copyright @ Cave Gamba Sas
Excavating marble since 1965