Physically,
these are recrystallized, Hard, Compact, fine to very fine
grained metamorphosed rocks capable of taking shining
polish.
Hardness:
3 to 4 on Moh's Scale
Density:
2.55 to 2.7 Kg/cm3
Compressive Strength:
70 to 140 N/mm2
Modulus of Rupture:
12 to 18 N/mm2
Water Absorption:
Less than 0.5% (except
Rainforest Green/Brown with 2-3%)
Porosity:
Quite low
Weather Impact:
Resistant
Chemically, they are crystalline rocks
composed predominantly of calcite, dolomite or serpentine minerals. The
other minor constituents vary from origin to origin.
Lime (CaO) :
28-32%
Silica (SiO2) :
3-30% (varies with variety)
MgO:
20 to 25%
FeO + Fe2O3:
1-3%
Loss On Ignition (LOI) :
20-45%
Umang Stone International
:
403, Sapphire
Jagan Plaza , SMS HIGHWAY Tulsi Marg, Banipark,Jaipur - 302016
, India
Phone : +91-141- 2329782 / 2207786
Mobile :
+91-9414044481
Fax : +91-141-2207786
Emai
: umangsi@sancharnet.in
,
info@umangstone.com,umangsales@gmail.com
UK's largest supplier of Cotswold Stone - Stone Supplies -
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