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Coral

Limestone

Quartzite

Slate

Technical Information - Slate

Slate with its natural colors, varied multicolored patterns and textures provide this stone with a distinctive appearance.

GROUP -Metamorphic

COMMON ROCK-FORMING MINERAL GROUP- Silicates

COMPOSITION- Muscovite, chlorite, kaolinite, micas, quartz and other accessory minerals (wide variation in composition)

HARDNESS - Soft to as Hard and dense as granite

MOHS' SCALE 2.5 - 5.5

POROSITY % 0.4 - 5

ABSORPTION % 0.1 - 1.7

COLORS –

Grey Slate

Multicolor Slate

Black Slate

Green Slate

Purple Slate

Grey -

Chemical Analysis

Technical Analysis

Calcination loss

2,6%

Visible volumetric mass

2736.KG/M³

Absorption coefficient

0,207%

Breaking load through indirect stress by bending

76,1MPa

Breaking load through indirect stress by bending after cooling

30,9MPa

Wear by attrition: abrasion coefficient in tribometer

6,50mm

OBS: 1 Mpa = 10,2 Kg.ƒ/cm²

Silicon

63,8%

Iron Oxide

6,4%

Aluminium Oxide

18,7%

Calcium Oxide

1,0%

Magnesium Oxide

2,3%

Potasium Oxide

3,2%

Sodium Oxide

1,8%

Sulphates expressed as SO3Inf. 0,1%

Multi coloured

Chemical Analysis

Technical Analysis

Calcination loss

2,6%

Visible volumetric mass

2722.KG/M³

Absorption coefficient

0,409%

Breaking load through indirect stress by bending

31,3MPa

Breaking load through indirect stress by bending after cooling

20,6MPa

Wear by attrition: abrasion coefficient in tribometer

7,54mm

OBS: 1 Mpa = 10,2 Kg.ƒ/cm²

Silicon

63,4%

Iron Oxide

7,3%

Aluminium Oxide

18,6%

Calcium Oxide

0,7%

Magnesium Oxide

2,5%

Potasium Oxide

2,9%

Sodium Oxide

1,8%

Sulphates expressed as SO3Inf. 0,1%

Black -

Chemical Analysis

Technical Analysis

Calcination loss

6,5%

Visible volumetric mass

2744.KG/M³

Absorption coefficient

0,386%

Breaking load through indirect stress by bending

36,5MPa

Breaking load through indirect stress by bending after cooling

30,5MPa

Wear by attrition: abrasion coefficient in tribometer

6,85mm

OBS: 1 Mpa = 10,2 Kg.ƒ/cm²

Silicon

55,7%

Iron Oxide

6,3%

Aluminium Oxide

17,4%

Calcium Oxide

0,7%

Magnesium Oxide

6,3%

Potasium Oxide

2,6%

Sodium Oxide

1,8%

Sulphates expressed as SO3Inf. 0,6%

GREEN

Chemical Analysis

Technical Analysis

Calcination loss

2,9%

Visible volumetric mass

2720.KG/M³

Absorption coefficient

0,616%

Breaking load through indirect stress by bending

24,3MPa

Breaking load through indirect stress by bending after cooling

20,0MPa

Wear by attrition: abrasion coefficient in tribometer

7,57mm

OBS: 1 Mpa = 10,2 Kg.ƒ/cm²

Silicon

64,5%

Iron Oxide

6,8%

Aluminium Oxide

17,2%

Calcium Oxide

0,7%

Magnesium Oxide

2,1%

Potasium Oxide

3,6%

Sodium Oxide

1,9%

Sulphates expressed as SO3Inf. 0,1%

Purple ---- N/A

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