Ravon Black Granite Quarry

Ravon Black Granite Quarry is located in Ardabil Province, and its extracted stone is marketed under the Ravon Black trade name. The stone is classified within the atlas’s black granite family.

Quarry overview

Related stone
Black Granite
Province
Ardabil
County
Namin
Operating status
Active

Laboratory tests

Physical and Mechanical Properties of Raven Black Granite

Laboratory: Laboratory of Rock Mechanics, Tarbiat Modares University

Date / version: Spring 1405 SH

Test results for the sample
ParameterValueUnitStandard
Dry density2.64g/cm³ASTM C97; as cited in the report assessment table
Saturated density2.65g/cm³ISRM saturation and buoyancy method
Specific gravity2.67DimensionlessASTM C97; as cited in the report assessment table
Porosity0.90%ISRM Suggested Methods / EN 1936; as cited in the report
Water absorption0.34%ASTM C97
Mohs hardness6.5Mohs scaleScratch testing using Mohs hardness references
Uniaxial compressive strength161.77MPaASTM D7012 / ISRM; as cited in the report
Ultimate failure load779.33kNCompressive strength test
Loading-face length70.01mmCompression specimen measurement
Loading-face width68.81mmCompression specimen measurement
View PDFDownload laboratory report PDF · 755 KB

Chemical Analysis of Raven Black Granite — XRF

Sample: Raven Black Granite; sample 05-87

Laboratory: X-Ray Laboratory, Faculty of Sciences, Tarbiat Modares University

Date / version: 21 June 2026; as stated on the analysis sheet

Test results for the sample
ParameterValueUnitStandard
Loss on ignition (LOI)2.18%ASTM D7348; as cited on the analysis sheet
Sodium oxide (Na2O)5.021%XRF
Magnesium oxide (MgO)2.192%XRF
Aluminium oxide (Al2O3)21.545%XRF
Silicon dioxide (SiO2)51.638%XRF
Phosphorus pentoxide (P2O5)0.624%XRF
Potassium oxide (K2O)3.579%XRF
Calcium oxide (CaO)6.701%XRF
Titanium dioxide (TiO2)0.817%XRF
Manganese oxide (MnO)0.136%XRF
Iron oxide (Fe2O3)5.325%XRF
Copper (Cu)0.010%XRF; semi-quantitative result
Zinc (Zn)0.006%XRF; semi-quantitative result
Rubidium (Rb)0.004%XRF; semi-quantitative result
Strontium (Sr)0.093%XRF; semi-quantitative result
Zirconium (Zr)0.037%XRF; semi-quantitative result
Niobium (Nb)0.004%XRF; semi-quantitative result
Barium (Ba)0.089%XRF; semi-quantitative result

Mineralogical Analysis of Raven Black Granite — XRD

Sample: Raven Black Granite; chart identifier 05-87-S1

Laboratory: Tarbiat Modares University

Date / version: 23 June 2026; date shown on the chart

Test results for the sample
ParameterValueUnitStandard
Identified mineralAnorthite, sodianPercentage not reportedXRD
Identified mineralAnalcimePercentage not reportedXRD
Identified mineralSanidinePercentage not reportedXRD

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