Slate/Phyllite Oltu Black Stone
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Slate/Phyllite
Oltu Black Stone
jet/lignite stone
A black slate/phyllite with a documented natural-stone character. The recorded appearance includes smooth compact. Recorded applications include slabs, tiles, cladding and flooring.
Stone familySlate/Phyllite
Primary colourBlack
Medium verification · Reference STN-0000169
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Professional reference
Specification snapshot
Indicative catalogue data. Verify the exact stone, finish, thickness and current test certificates before specification.
Mohs hardness3-5
Water absorption0.2-1.5 %
Compressive strength80-200 MPa
Flexural strength15-40 MPa
Density2600-2900 kg/m³
PorosityNot reported
Material profile
Character & application
- Common finishes
- Natural cleft, brushed, honed
- Typical uses
- Slabs, tiles, cladding, flooring, bathrooms, hospitality interiors, facade/paving where tested
- Exterior suitability
- Excellent for cladding/paving
- Frost resistance
- Generally good
- Recorded colour palette
- Black