36 Textures

Row 1: sharp, lightweight, luminous, elasticity, distort, flexible

Row 2: soft, scatter, refractive, fluid, transparent, grow

Row 3: rays, flow, geometrical, metallic, stiff, tough

Row 4: crystalline, pattern, layered, fixed, opaque, symmetrical

Row 5: boundaries, adaptable, brittle, linear, lattice, laminated

Row 6: resistant, cells, connected, ooze, damage, crack

I used the following 3 textures in the stairs of my model. 

The first was used in the supporting poles for the spiral stairs and railings as it resembled a laminated metal texture.
The second was used in the cantilever stairs as an aesthetic detail to the tread.
The third was used in the spiral stair railing as it resembled a tire texture.