materials library / classes / stone and earth
NEURODESIGN® · MATERIAL CLASS · STONE AND EARTH
Slate
Fine-grained metamorphic rock that cleaves to a naturally textured face. Dark, low reflectance, high within-surface variation.
Decisive attributes
The attributes that most determine how this class behaves and how it is experienced. No values are shown, because a value belongs to a product and not to a class. Two products of the same material can differ from each other by more than the material differs from its neighbours.
Typical application
Flooring. Wet areas. Cladding.
Evidence
No record in the research corpus tests human response to this material class. Its physical behaviour may be well understood and its properties may be entirely predictable from the attributes above. That is a different thing from evidence that a person responds to it, and this library does not convert one into the other. The absence is shown rather than filled.
Outcomes it could bear on
Outcomes whose material levers overlap this class. This is a structural relationship in the ontology, not a finding: it says the property is relevant to the outcome, not that this material produces it.
- Footing confidencevia Dynamic coefficient of friction, Surface roughness Ra
- Aesthetic preferencevia Batch variation
- Circadian light deliveryvia Light reflectance value
- Cognitive load from the environmentvia Batch variation
- Glare and visual comfortvia Light reflectance value
- Perceived spaciousnessvia Light reflectance value
- Perceived warmth of a spacevia Surface roughness Ra
- Sleep onset and continuityvia Light reflectance value
- Tactile comfortvia Surface roughness Ra